M.R.D.A. — Third-party notices ============================ These licenses apply to the named third-party components, not to the project's original code, music, levels, textures, or other game assets. Pixabay sound effects https://pixabay.com/sound-effects/ Sound effects from Pixabay, used under the Pixabay Content License. This credit applies to sound effects sourced from Pixabay, not to the original menu music credited to Tomas Faltys. Official license summary: https://pixabay.com/service/license-summary/ Full, legally binding terms: https://pixabay.com/service/terms/ License information reviewed on 27 October 2026 (terms last updated 20 October 2026). The following is a summary, not a replacement for the applicable license or legal advice. The Content License permits commercial and non-commercial use and adaptation, subject to its restrictions. Section 6 makes attribution optional and suggests "by [Contributor] via Pixabay" when giving credit. The source credit above is voluntary; it does not imply endorsement, ownership of the recordings, or exclusive rights. Content must not be sold or distributed on a Standalone basis, including as unmodified audio files. Combining sounds with other media into a new creative work can be permitted; merely renaming or converting a file does not establish this. Do not offer the recordings as a standalone sound library. Review distribution of raw audio in a public source repository separately from use within the game; a credit does not authorize otherwise prohibited redistribution. Other prohibited uses and third-party rights may apply, including rights in recorded voices, audio samples, and brands. Pixabay does not warrant that all necessary third-party permissions have been obtained. Sound source references (reviewed 27 October 2026): Paths below are relative to public/sounds/. Contributors are the Pixabay accounts credited by the source, not a claim about original authorship. 080902_Shotgun By freesound_community via Pixabay https://pixabay.com/users/freesound_community-46691455/ https://pixabay.com/sound-effects/film-special-effects-080902-shotgun-39753/ Local file: weapons/shotgun.mp3 Source match: asset 39753 in the file's macOS download-origin metadata. Shotgun 03 By freesound_community via Pixabay https://pixabay.com/users/freesound_community-46691455/ https://pixabay.com/sound-effects/film-special-effects-shotgun-03-38220/ Local file: weapons/shotgun_dual.mp3 Source match: asset 38220 and contributor freesound_community in the file's macOS download-origin metadata. Light machine gun (M249) gunfire sound effect Via Pixabay https://pixabay.com/sound-effects/film-special-effects-076415-light-machine-gun-m249-39827/ Local file: weapons/machinegun_shot.mp3 Source reference and local filename supplied by the project owner on 1 November 2026. The source page title was verified; contributor, source-to-file mapping, download date, and asset-specific license evidence have not been independently recorded. 18 Rolling Ball F7 (asset 96956) Via Pixabay https://pixabay.com/sound-effects/film-special-effects-18-rolling-ball-f7-96956/ Local file: weapons/machineg_shell.mp3 Source reference supplied by the project owner on 1 November 2026. Used for machine-gun casing bounces. The page describes a rolling-ball recording; contributor, source-to-file mapping, download date, and asset-specific license evidence have not been independently verified. Gun Reload by DRAGON-STUDIO (asset 511309) Via Pixabay, Pixabay Content License https://pixabay.com/sound-effects/film-special-effects-gun-reload-511309/ Local file: weapons/machinegun_reload.mp3 (unmodified, 1.5 s) Downloaded from the source page on 1 November 2026 at the project owner's request. Used for the machine-gun magazine reload. Electric Impact (asset 37128) By freesound_community via Pixabay, Pixabay Content License https://pixabay.com/users/freesound_community-46691455/ https://pixabay.com/sound-effects/film-special-effects-electric-impact-37128/ Local file: player/electricshock.mp3 (3.144 s, stereo, 24 kHz, 160 kb/s) Supplied by the project owner on 1 November 2026 for Thundergun overload feedback. Source match: asset 37128 and contributor freesound_community in the file's macOS download-origin metadata. The source page title and contributor were verified on the same date. Used within the game, not offered as a standalone sound library. 062708 Laser Charging (asset 81968) Via Pixabay, Pixabay Content License https://pixabay.com/sound-effects/film-special-effects-062708-laser-charging-81968/ Local file: weapons/plasmacharge.mp3 Source reference and local recording supplied by the project owner on 2 November 2026. Used while charging the plasma gun, locally and for nearby multiplayer players. Contributor and asset-specific download evidence have not been independently verified. Computer Processing Sound Effects - Short Click Select 02 (asset 122133) Via Pixabay https://pixabay.com/sound-effects/film-special-effects-computer-processing-sound-effects-short-click-select-02-122133/ Local file: weapons/selection.mp3 Source reference and local recording supplied by the project owner on 2 November 2026. Used for local weapon-selector scrolling and func_button activation. Contributor and asset-specific download evidence have not been independently verified. The clip follows master volume and gameplay audio muting. Shotgun Shell Ejection (asset 34378) Via Pixabay https://pixabay.com/sound-effects/film-special-effects-shotgun-shell-ejection-34378/ Source reference supplied by the project owner. The source page returned HTTP 403 during verification; contributor and local filename remain unverified. Thunder clap By u_q2hb2391vb via Pixabay (contributor account name from the download filename; not verified against the source page) https://pixabay.com/sound-effects/film-special-effects-thunder-clap-521194/ Local file: weapons/thunderstart.mp3 Source match: asset 521194 in the file's macOS download-origin metadata. Played from 0.5 s to skip the clip's leading silence. Big Tesla Coil Sound (cut) By freesound_community via Pixabay https://pixabay.com/sound-effects/ (asset 71907) Local file: weapons/thunder.mp3 Source match: asset 71907 and contributor freesound_community in the file's macOS download-origin metadata; the source page URL was not verified. Wind ambience By freesound_community via Pixabay https://pixabay.com/users/freesound_community-46691455/ https://pixabay.com/sound-effects/nature-wind-ambience-14720/ Local file: ambience/wind_ambience.mp3 Source match: supplied by the project owner; no local download-origin metadata remains. Local duration agrees with the source's rounded 2:57. Concrete footsteps By freesound_community via Pixabay https://pixabay.com/users/freesound_community-46691455/ https://pixabay.com/sound-effects/film-special-effects-concrete-footsteps-6752/ Local file: player/multiple_steps.mp3 Source match: asset 6752 and contributor freesound_community in the file's macOS download-origin metadata. Industrial machine loop By dbsound via Pixabay https://pixabay.com/users/dbsound-46267576/ https://pixabay.com/sound-effects/technology-industrial-machine-loop-250786/ Local file: ambience/industrial_machinery_1.mp3 Source match: supplied by the project owner; no local download-origin metadata remains. Local duration agrees with the source's rounded 2:43. St1 - Footstep sfx By Yarzur_ofc via Pixabay https://pixabay.com/users/yarzur_ofc-49620193/ https://pixabay.com/sound-effects/film-special-effects-st1-footstep-sfx-323053/ Local file: player/footstep.mp3 Source match: asset 323053 in the file's macOS download-origin metadata, confirmed against the source page. This is a separate recording from Concrete footsteps, not an excerpt of that recording. Fire Crackling Sound By SoundReality via Pixabay https://pixabay.com/sound-effects/nature-fire-crackling-sound-499636/ Local file: ambience/fire.mp3 Source reference: supplied by the project owner; the source page credits SoundReality. Local download-origin metadata points to shotgun asset 39753 instead, so the file-to-source match remains unverified. Bullet gunshot impact (asset 390253) Via Pixabay https://pixabay.com/sound-effects/film-special-effects-bullet-gunshot-impact-390253/ Source reference: supplied by the project owner on 27 October 2026. The source page returned HTTP 403 during verification. Contributor, local filename, download date, and asset-specific license evidence remain unverified; no contributor name or file mapping is assumed. Confirm these details and add the contributor credit when available. RPG Sword Attack Combo 2 (asset 388916) Via Pixabay https://pixabay.com/sound-effects/film-special-effects-rpg-sword-attack-combo-2-388916/ Source reference supplied by the project owner. Local filename, contributor, and source-to-file mapping have not been identified. Notification Sound (asset 7062) Via Pixabay https://pixabay.com/sound-effects/film-special-effects-notification-sound-7062/ Source reference supplied by the project owner. Local filename, contributor, and source-to-file mapping have not been identified. Explosion Effect (asset 494317) By DRAGON-STUDIO via Pixabay https://pixabay.com/users/dragon-studio-38165424/ https://pixabay.com/sound-effects/horror-explosion-effect-494317/ Source reference supplied by the project owner on 30 October 2026. The source page credits DRAGON-STUDIO, verified on 30 October 2026. Local filename, source-to-file mapping, download date, and asset-specific license evidence have not yet been recorded. Zombie Sound 2 (asset 357976) Via Pixabay https://pixabay.com/sound-effects/horror-zombie-sound-2-357976/ Source reference supplied by the project owner on 30 October 2026. The source page returned HTTP 403 during verification. Contributor, local filename, source-to-file mapping, download date, and asset-specific license evidence remain unverified; no contributor or file mapping is assumed. Zombie idle sound search (page 3) https://pixabay.com/sound-effects/search/zombie%20idle/?pagi=3 Discovery reference supplied by the project owner on 30 October 2026. This is a changing search-results page, not an individual recording or asset-specific license reference. No recording, contributor, or local file mapping is assumed. Record the individual asset URL and license evidence when a sound is selected. The source pages with identified local sound mappings link to the Pixabay Content License summary. Download dates and download certificates have not yet been recorded. CDN path dates and page publication dates are not download dates. The single-footstep page mentions "Gmod"; independently verify any underlying game-audio rights before release rather than treating an uploader credit as proof of ownership. Asset verification before release and when adding/replacing sounds: For each Pixabay recording, retain the local filename, original asset page URL, contributor name/profile, download date, applicable license terms, and any available download certificate or permission evidence. Where known, add an individual "by [Contributor] via Pixabay" credit linked to the asset page. Check any additional third-party permissions. Update both the menu's Sound effects & sources list and the references above when adding or replacing recordings. The remaining evidence and permission checks mean this notice is not confirmation of asset-by-asset clearance or permission to redistribute raw recordings. Kenney - Particle Pack (particle and effect sprites) https://kenney.nl/assets/particle-pack Creator: Kenney (https://kenney.nl/) License: CC0 1.0 Universal (public domain dedication) https://creativecommons.org/publicdomain/zero/1.0/ Full legal code: https://creativecommons.org/publicdomain/zero/1.0/legalcode Local assets: public/sprites/PNG (Black background)/ and public/sprites/PNG (Transparent)/, including their Rotated/ variants. Used for particle and sprite effects, including smoke_09.png impact puffs. This attribution applies to the Particle Pack assets, not unrelated sprites that may be added later. The official asset page identifies the pack as CC0. Kenney's support page (https://kenney.nl/support) confirms that commercial use is allowed, attribution is not required, and voluntary credit may simply mention "Kenney". The project's credit is voluntary. Do not use Kenney's logo, which is reserved for official Kenney projects, or imply endorsement. CC0 permits copying, modification, and redistribution, including for commercial purposes, without asking permission. Patent, trademark, privacy, publicity, and other persons' rights are not waived by CC0. The assets are provided without warranties. The linked CC0 legal code governs; this notice is a summary. Sources reviewed 27 October 2026. three.js (3D rendering) https://threejs.org/ The MIT License Copyright © 2010-2024 three.js authors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. three-bvh-csg (editor geometry operations) https://github.com/gkjohnson/three-bvh-csg MIT License Copyright (c) 2022 Garrett Johnson Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. three-mesh-bvh (spatial acceleration dependency of three-bvh-csg) https://github.com/gkjohnson/three-mesh-bvh MIT License Copyright (c) 2018 Garrett Johnson Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Barlow and Barlow Condensed (fonts served by Google Fonts) https://github.com/jpt/barlow Copyright 2017 The Barlow Project Authors (https://github.com/jpt/barlow) This Font Software is licensed under the SIL Open Font License, Version 1.1. This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL ----------------------------------------------------------- SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 ----------------------------------------------------------- PREAMBLE The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others. The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives. DEFINITIONS "Font Software" refers to the set of files released by the Copyright Holder(s) under this license and clearly marked as such. This may include source files, build scripts and documentation. "Reserved Font Name" refers to any names specified as such after the copyright statement(s). "Original Version" refers to the collection of Font Software components as distributed by the Copyright Holder(s). "Modified Version" refers to any derivative made by adding to, deleting, or substituting -- in part or in whole -- any of the components of the Original Version, by changing formats or by porting the Font Software to a new environment. "Author" refers to any designer, engineer, programmer, technical writer or other person who contributed to the Font Software. PERMISSION & CONDITIONS Permission is hereby granted, free of charge, to any person obtaining a copy of the Font Software, to use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the Font Software, subject to the following conditions: 1) Neither the Font Software nor any of its individual components, in Original or Modified Versions, may be sold by itself. 2) Original or Modified Versions of the Font Software may be bundled, redistributed and/or sold with any software, provided that each copy contains the above copyright notice and this license. These can be included either as stand-alone text files, human-readable headers or in the appropriate machine-readable metadata fields within text or binary files as long as those fields can be easily viewed by the user. 3) No Modified Version of the Font Software may use the Reserved Font Name(s) unless explicit written permission is granted by the corresponding Copyright Holder. This restriction only applies to the primary font name as presented to the users. 4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font Software shall not be used to promote, endorse or advertise any Modified Version, except to acknowledge the contribution(s) of the Copyright Holder(s) and the Author(s) or with their explicit written permission. 5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software. TERMINATION This license becomes null and void if any of the above conditions are not met. DISCLAIMER THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER DEALINGS IN THE FONT SOFTWARE. Earlier character asset ----------------------- Retro soldier GLB exports (public/models/player/) supplied by the project owner, with Walking and Running animations, exported using Meshy.ai. https://www.meshy.ai/ Previously used for multiplayer players, lobby previews and offline npc_test targets; retained on disk but no longer loaded. The source/export date, applicable license terms and permission evidence have not yet been recorded here; verify these before distribution. Current character asset ----------------------- Vozenilek (public/models/vozenilek/npc_vozenilek.glb), supplied by the project owner with embedded textures, a skeleton and animation clips. Used for multiplayer players, lobby previews, npc_test and npc_vozenilek. The source/export date, applicable license terms and permission evidence have not yet been recorded here; verify these before distribution. Development tools (not shipped as runtime libraries) --------------------------------------------------- TypeScript — Microsoft Corporation — Apache License 2.0 https://www.typescriptlang.org/ https://github.com/microsoft/TypeScript/blob/main/LICENSE.txt Vite — Vite contributors — MIT License https://vite.dev/ https://github.com/vitejs/vite/blob/main/LICENSE