У вашего броузера проблема в совместимости с HTML5
Dark Encounters 32 map Doom 2 MegaWad for GZDoom created by yours truly (Paul Dechene aka Payload4367). Built with GZDoomBuilder.
Dark Encounters Wad:
Drop box:
http://www.mediafire.com/file/vrx99vx8zzm0sxa/drkenctr.zip
Idgames archives:
https://www.doomworld.com/idgames/levels/doom2/Ports/megawads/drkenctr
used during gameplay:
HD texture pack - zd-dhtp-20101225.pk3
Brightmaps pack - SBrightmaps.pk3
Blood/gore pack - ketchuptest4.pk3