Bad company 2, Theme Hospital, Roller Coaster Tycoon, Thief 2 Metal Age, Team Fortress 2

Dark Souls

Monster Hunter 3(U)
Dark Souls
Fire Emblem: Awakening (also played it and loved every second, wouldn't mind getting back to it any time :D)
RPG Maker VX Ace (not 100% a game, but it's on Steam and it technically contains an unlimited amount of games ;p)
Euro Truck Simulator 2

I would probably throw in 2 or 3 MMORPGs like WoW or AION, other than that TF2 and Dota2 + maybe C&C Generals

Good thing this is only hypothetical =)

GTA San Andreas
Fallout New Vegas
TES V Skyrim
Alan Wake
Far Cry 3

Master of Magic, Wizardry 8, Civilization 4, Master of Orion 2, Terraria

None, none, none, none, and none. Sorry, but no game is worth that no matter how good it is.

CSGO

Minecraft

GTA 5

Battlefield 4

Garrys mod (since you can play everything in that mod)

Mass Effect, Battlefield 4, GTA IV, Dota 2, Assassin's Creed III.

CS:GO, CS:S, HL1, HL2, Portal 2

Prison Architect
Game Dev Tycoon
Verdun
Starbound
Call Of Duty 4: Modern Warfare

Skyrim
GTA V ( if I had a console )
Far Cry 3
Rust
Team Fortress 2 ( probably ).

Deus Ex
Pokémon Soul Silver
Need For Speed: Most Wanted (2005)
Age Of Empires II

and I guess I don't have a preference for the last one.

wow

diablo 2

quake live

starcraft bw

deep fritz 14

1. Dota 2
2. Payday 2
3. CS Global Offensive
4. Dirt 3
5. Battlefield 3

Battle tanks, FIFA '98, homm3, DotA, CS 1.6

Skyrim, Killing Floor, Bejeweled 3, BL2

• Dota 2

• Skyrim

• Stepmania

• Rusty Hearts(provided bugs are fixed,active development returns and a big rebalance patch will be delivered)

• Something with ton of ugc. Would it be considered cheating if I choose an engine and get all the games that require it to play?

Rome 2 Total War
Fallout: New Vegas
State of Decay
Supreme Commander
Battlefield 4

Dota 2, Civ 5...I'm not sure about the rest yet. AoE2, Homm3 I'd consider...

1. Total Annihilation (easily moddable, infinite fun, explosions)
2. Deus Ex (old Unreal engine FPS/RPG -- should be highly moddable, though I never tried on this one)
3. Team Fortress 2 (Source engine game -- fairly moddable, always fun multi-player FPS)
4. Sim City 2000 (with the Urban Renewal Kit) or Roller Coaster Tycoon 2 (which is pretty much what I started making with SCURK anyway)
5. ...don't know, but I'm tempted to go with either a very modern Unreal engine-based game or the Quake engine. Or maybe Super Meat Boy.

(Strangely, my favorite game of all time does not make the cut. Though I love it, it's not one I could play repeatedly or easily mod -- Grim Fandango.)

1. Final Fantasy VII
2. Suikoden II
3. Breath of Fire III
4. Nation Red
5. Dynasty Warriors series

Too bad it's just top 5 :/

1. WoW: TBC
2. DotA
3. WoT
4. KOTOR 2
5. Mass Effect

Sid Meier's Civilization V

FTL: Faster Than Light

Super Hexagon

Supreme Commander 2

X3: Terran Conflict

• World of Warcraft
• Minecraft
• Syndicate (the Bullfrog one)
• Heartstone
• Warhammer 40.000 Dawn of War

I don't need more games than those (easily the most replayable I have).