What are some really cool games

Well it really depends on what type of games your into.
PC:
WOW (world of Warcraft)
Growtopia (stupid but fun)
Roblox (ehhh)
MSP (movie star planet)
Flappy bird
Impossible game
IOS:
Flow
Sims
Crossy road
The trace
Temple run
(Arnt really "cool" but entertaining)