У вашего броузера проблема в совместимости с HTML5
Blind playthrough of "TouchDown" (touch.bsp), a custom Q2 single player map made by EraserX.
Release Date: 16/04/1998
Download (touch.zip)
http://www.3dgamersedge.com/spq2lvlrevs/touchdown.html
Skill 2 Hard
Secrets = 0/0
Kills = 76/76
Game: Quake 2
https://store.steampowered.com/app/2320/QUAKE_II/
Custom Engine: Q2XP 1.26.8 final release (by Quake2XP Team)
https://www.moddb.com/mods/quake-2-xp/
HD Weapons Models: Quake 2 Weapons Remodel (by Turic)
https://www.moddb.com/mods/quake2-remodel
HD Monster skins: Quake 2 Monster Skins (by Fragger)
https://www.moddb.com/mods/quake-2-monster-skins
HD HUD and HD Menu are from KMQuake2
http://www.markshan.com/knightmare/
Soundtrack: PSX Final Doom music - Combine (by Aubrey Hodges)
https://www.youtube.com/watch?v=P83BOapdrgw