In that case, you really should pick up games like all-time horde shooter Left 4 Dead 2 (which is currently going for less than a dollar) and Killing Floor 2, which I guess is technically about ...

Vampires Fest, is capable of bringing a seemingly dormant game back to life. Left 4 Dead is 90% off from now until Monday June 2, 2025, bringing its price down to $0.99 USD / £0.85.