This is a joke map that I originally uploaded to the Steam Workshop as both a Garry's Mod and TF2 map, it's ctf_2flat with a gm_flatgrass aesthetic.

Keep in mind that this is mostly designed as a joke map, and wasn't originally made with TF2 gameplay in mind, although the TF2 version has received tweaks to adjust the gameplay to TF2 standards. Also, yes, I do know that certain resupply cabinets are a little bugged and don't open when you use them.