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.
Mushroomia
Nanosaur 2
Zombie Road
SolarWolf
The Odyssey Winds Of Athena
Rolling Thunder 3
Flying Kiwi
Robocopvs The Terminator
Rastan Saga 2
Sonic Assault
PayDay 2
Venus Hostage
Hopmon
Emerald Tale
Serious Sam The First Encounter
COMMAND and CONTROL
Path of Shadows prototype
Aerothe Acro Bat
Zombie Invaders 2
UGX Cabin
Jacky Bomb
The WildWest
Abundante!
Kru Robo Smasher
Hydro Hydra
Flight For Fight
TAGAP
The Cerberus Incident
Discover FDM
Add-on support
You can get add-ons that download files/video from arbitrary websites.