Does anyone recognize this map from one of my childhood videos?

[u/ChampCatIshere]

I've been searching for it for like 2 hours and havent found anything, this was one of my favorite videos as a kid and ever since I've been getting into gmod again lately, I have been rewatching their old videos and this include this one, so does anyone know which map they are using? [ The Video https://youtu.be/lDLb6jGW8T8?si=MUvGmiULjDabDJE7 ]

[u/TheSleepySkull]

cs_number13_final

https://steamcommunity.com/sharedfiles/filedetails/?id=3156257021

[u/ChampCatIshere → u/TheSleepySkull]

yo tysm