I recently stumbled across the video below which recreates the Call of Duty Nazi Zombies mode. This mode first appeared in Call of Duty: World at War. The mode has you in a safe house fighting off waves of Nazi zombies. Additional weapons can be purchased as well as new areas opened up. The game is designed for co-op play and so I never lasted long in it (I have no one to play games with!), despite the hardness it was kinda fun.
The video below recreates the feeling of being in the game quite well, kinda cool using the games sound effects and music riffs. Maybe one day I will get to play this mode in co-op!