What's the most addicting game you have ever played?

[Jason1]

Hm, thats tough. Super Mario 3 comes immediatley to mind. As for something a little more recent, Super Mario 64 was mesmerising.

Ocarina of Time for sure, best game ever made. And I'll also give a nod to Metroid Prime, the best game on the Gamecube.

Oh, and Half Life 2. I had been waiting so very long for it, and completley lived up to expectations.