First addicting game.
 

I think we all had one, that fame that you just wanted to play again and again. There are a few I remember I think Bubble bobble was my first one on the C64 but my first most addicting games where
- It came from the desert (was freaky but good)
- Rocket Ranger
- Wings

(okay so it went from one to about four hehe but once I thought of one all these others popped up)

Probably the two most addictive games I've played... Diablo and Final Fantasy VII... those two games each ate large chunks of my younger years :)

A game on the C64 where you had a bouncy-ball and had to navigate a scrolling terrain and obstacles, I can't think of the name of the game though >.<

Winter Games and Frogger were also right up there.

Aww I had that marble game, I think it was marble madness.

Oh hell yes, on the SNES I think it was... that game was awesome fun :)

I did lose a big chunk of time to fallout 1 and 2 as well :)

Halls of the Things on Spectrum - I dont think I've ever been so addicted to a game (I was pretty young....).

Yeah sounds like Marble Madness or maybe Wizball?

I'm not sure which came first for me. Dungeon Master or Civilisation. Both of those just filled my every waking moment... :) From the release dates I guess it was DM first!

Choplifter on the Apple II. Loved saving those little stick figures.

http://pnmedia.gamespy.com/classicga.../choplift2.gif

Doom.

Aha I worked it out, the game I couldn't think of was Bounder - it was incredibly addictive!! Civilisation is still an old favourite - oh and Transport Tycoon, I still give that a run every now and again!