Damn, I've got so many, haha. My absolute favorite are in gold.

Western ones:

Mirror's Edge & Mirror's Edge Catalyst
Portal & Portal 2
Quake III Arena & Quake Live
Urban Terror
Half-Life 2
Black Mesa
NEOTOKYO
Counter-Strike: Source & Counter-Strike: Global Offensive
Garry's Mod
Guild Wars & Guild Wars 2
Battlefield 3 & Battlefield 4
The Elder Scrolls V: Skyrim
The Last Of Us
Journey

Japanese ones:

Golden Sun & Golden Sun: The Lost Age
The Legend Of Zelda: A Link To The Past
The Legend Of Zelda: A Link Between Worlds
The Legend Of Zelda: Oracle Of Seasons & Oracle Of Ages
The Legend Of Zelda: The Minish Cap
Super Mario World
Pokemon Crystal
Pokemon Ruby & Sapphire
Pokemon FireRed & LeafGreen
Pokemon Emerald
Pokemon Diamond & Pearl
Pokemon Platinum
Pokemon HeartGold & SoulSilver
Pokemon Black & White
Pokemon Black & White 2
Pokemon X & Y
Pokemon Omega Ruby & Alpha Sapphire
Metroid Fusion
Mega Man Zero, Mega Man Zero 2, Mega Man Zero 3 & Mega Man Zero 4
Kirby: Nightmare In Dream Land
Kirby & The Amazing Mirror
Sword Of Mana
Mega Man ZX & Mega Man ZX Advent
Golden Sun: Dark Dawn

League of Legends
Battlefield Bad Company 2
Urban Terror
CS GO

Cthulhu wrote:

Urban Terror
Red Eclipse
Nexuiz
Warsow
Blood Frontier

Sorry, but i forgot Sauerbraten and Postal 2

play a lot of rust latly
but other games i play
warthunder
urt terror
gta-5
fifa
assasins creed

holiday

only urban terror

My favorites are: Splinter Cell (all games), in general Ubisoft games, UrT , Fifa or Pes .
THE BEST GAME IS: MORTAL KOMBAT XL !

Other than Urban Terror?

Elite (BBC/Amstrad cpc/zx spectrum)
Frontier - Elite 2 (Amiga)
Doom
The Super Mario series of games on the NES/SNES (SM Bros 1,2,3, SM world etc...)
Goldeneye (N64)
Perfect Dark (N64)
Legend of Zelda (Ocarina of Time) (N64)
Tribes/Tribes2
Operation Flashpoint
Unreal Tournament 2004
Counter Strike Source
Portal 1 & 2

I love first person shooters, but URT is still my great passion