Action games
If you don't play games that much, there is a big chance you have played an action game, e.g. a shooter, at some point. This category is full of games that won't let you get bored.
FunnyGames - Plazma Burst 2
Friendly-Strike3
Critical Damage
America's Army
DroneSwarm
SCP Containment Breach
RESIDENT EVIL
Chrome
Combat Arms - Extreme Injector
Final Combat
Galactic Junk League
S.T.A.L.K.E.R. - Clear Sky
Plazma Burst 2
Alien Stars
Wolfenstein
Night Agression
Divinity 2 - The Dragon Knight Saga
Detonate
Ravenfield
Apex Legends
Duke Nukem - Manhattan Project
Alien Shooter 2 - Conscription
Knight Online
Street Fighter 2 The New Challengers
The Tanks
Atlas Reactor
Tank Commander
Rail of War
Discover FDM
Add-on support
You can get add-ons that download files/video from arbitrary websites.