For those of you who like text-based games...

[Soda]

No downloads required. All that happens is that some text is on the screen and you need to choose w/e (Ex: You grab a soda. 1. Drink it 2. Drop it 3. Die. [except its way more funny ]).

G4m3$ h33r (MyDoom.exe download required).

Ther you go. Have fun (with MyDoom)!

--- Update ---

BTW I recommend the game Abyss. Its awesome.