Steam gift called: Killing Floor Gift Includes 2 items: Killing Floor, Defence Alliance 2 Trading for: tf2 or cs2 keys

This bug makes the game impossible to play! 1) All the specimen are invisible to me; 2) They don't take any damage to me, so I get stuck and surrounded by invisible Specimen; 3) I can kill them but I only see blood floating when I hit them; Please Help I love this mod and I can't find a solution to it!!!!...

Case closed.

gaming??!

Game loads fine but once I make all my selections & start the game the enemies are invisable! I can see them on my radar, my guys are firing at something but I don't see any enemies!