Play SCP 5K. Or not. It's a pretty generic shooter set in SCP 5000. Meant to be multiplayer only, so it kind of sucks in singleplayer since there are no saves, you just lose your equipment and respawn at the last checkpoint.

>>717557423
SCP 5K, although it's more frustrating than scary. Only 173 had me spooked.

>>717448953
Well, SCP-008 is a zombie virus, which is what 5K zombies are. But 5K has a lot of concrete SCPs. The first enemy you encounter is 173, and later there is a segment with 3199. The second mission is all about 7528, and the third - 1262, and the 4th - 610.