testroom4

[Kerbo]

testroom4 is in the 2001 beta, its a bunch of black wire things in a blue foggy void. I've tried to do some searches online for what this map could really be, but I couldn't find much, only a garry's mod map.

https://imgur.com/a/7kdKlDC

[Soldier grug]

Probably a test map, but imagine what you would feel if you were there irl, cuz the map is so cozy yet so megalophobic. The air would smell like an unopened room for years.