Vote for the best: PC
 

Here you are.

starcraft followed very closely by Diablo.

Deus Ex.

Starcraft. I spent a good 4-5 years on that game. Now, it's just old and repetitive but in it's prime it kicked ass.

Deus Ex 4tw

You cant compare different types of games like that, thats an insult.

Warcraft III: The Frozen Throne. I personally do not own the game, but I used to play it when my brother still lived at home, but haven't the cash to buy it on my own.