Half-life 3...eeeerm.

Sa-mp

Need for Speed Underground 2.

Pokémon Blue for GameBoy!

Dendi - Mario
Sega - MK3/UMK3
PS1 - Resident Evil 2
PC - Counter Strike, Battlefield 3, Portal

Starcraft 1, Counter-Strike: Source and Guild Wars

So here's my journey and my favorite games:

• SNES - Megaman X (+ Chrono Trigger on a ROM)
• Gameboy Color - Pokemon Red
• N64 - Super Smash Bros
• Gameboy Advance - Golden Sun
• Xbox - Halo: Combat Evolved
• X360 - Mass Effect Trilogy + Halo 4
• 3DS - Pokemon Y
• PS4 - Assasin's Creed 4
• PC - Payday 2

Honorable Mention: Borderlands 2, played the hell out of it on X360 and then on PC with my best friend.

And my alltime favorite is...

HALO: COMBAT EVOLVED

This game was so damn fresh that made me buy an Xbox just to play it and to this day its franchise is pretty much the biggest reason that anyone buys a Microsoft console.

Hotline Miami 1 & 2, Broforce, Risk of Rain and Teleglitch.

CS, GTA:VC(the music is just TOO good) - TIE

Probably Far Cry 3. It's one of the most amazing open-world game I've ever played.