Basically, yeah. I'm super bored and have too much free time so I've started building and throwing around ideas. Currently the idea is that it's a TDM in an underground bunker, a fallout 3-esque vault, to say.
There are two teams, Infiltrators and Dwellers. The Infiltrators broke into the thought-to-be abandoned bunker for supplies after a nuclear war, and the Dwellers are horrible mutated people who don't take kindly to the Infiltrators.
The two elements are TDM and Creeper Arena. The Dwellers aren't effected by the creep mass, but it poses as an obstacle. The Infiltrators unfortunately aren't resistant and therefore they have to wash out the creeper while defending themselves from the Dwellers.
The start at the vault is a force field that disallows the creeper from spawnkilling the Infiltrators.
The Infiltrators are armed with pistols and medkits, while the Dwellers are armed with rusty pipes and other melee weapons scattered around the bunker.
I'm going to edit more ideas into this and build onto it every now and then, possibly adding screenshots.
I need feedback and criticism plz