I’ve seen a few games mentioned above that I love, such as Metal Gear Solid, the Grand Theft Auto series, Fallout 3 and Bioshock. But here are some more, including a few old school suggestions:
The Half Life series- Absolutely love these games. Half Life 2 stole my summer in 2009!
Crash Team Racing- Multiplayer Crash Team Racing is the epitome of fun
Rayman- I have a strange and unexplainable affinity to the old 2D Rayman…
Syphon Filter 2- Ahead of its time I think
The Pro Evo series- It’s lost its sparkle now, but back in the day it was amazing