Seriously - I have purchased Mass Effect 2, Little King's Story, Halo:Reach and Fallout: NV and haven't even played them yet because of my addiction. Any ideas of what I should do?

Keep playing Just Cause 2 till you get bored of it. Don't see why games should take priority over others. Just play the one you're enjoying at the moment.

kill yourself

Nothing, after you finish the game, there is a percentage so there are more side missions taking over places. You won't be able to stop regardless because the game is so much fun, even taking over places with no mission objectives.  
 
You should consider playing mass effect 2 on the side. I myself usually play a few games and stuff, I don't play one game at a time.

I had a friend like you, he died with an Xbox controller in his hand and the words 'JC2 forever' carved into his chest.

"I had a friend like you, he died with an Xbox controller in his hand and the words 'JC2 forever' carved into his chest. "

Burn the disc.

Just Cause 2 is just pure fun, Love it, play it, and save Fallout and mass Effect for when you are ready.

Keep playing it, its better than any of those other games you mentioned.

Games should be about fun. As long as you're still enjoying it there's no reason why you shouldn't play one game over another.

DUDE Just Cause 2 came out this year. I totally forgot, one of my GOTY candidates fo sho.  
 
Keep playing. 

I really need to get back to playing it, I finished like 3 missions and the rest of the time was playing around blowing up stuff.
 
I wonder if  Just Cause MMO would work.

i still need to buy that game. i've missed like 2 steam sales already

I didn't finish the game, but I played a hell of a lot of it. Most of the time I spent just messing around, my favorite thing to do is driving a truck off a cliff and watch it tumble down the mountain.

Thanks, folks - mostly good advice that I will take to heart. 

Go for the Freeroamer, Faction Benefactor, and Finders Keepers achievements. I did and I never want to play the game ever again after doing it.

That game was tons of fun., more power to you   
 
The only thing you need help with is buying waiting to buy new games when you're still busy older ones, might save yourself some dough.  No suggestions from me though, I have a similar problem.

Keep playing until you either get bored or run out of stuff to blow up. Then play Mass Effect 2 immediately.

@ natetodamax: Dang - you crazy. That's a lot of work. I'm surprised your thumbs didn't fall off.

I played the absolute shit out of Just Cause 2, it is such a good game. I even double dipped and have it on Xbox 360, and PC.
 
The game looks so beautiful, too. That engine they use is really something -- especially on PC with everything cranked up. But I have to say while it took me a long time to get tired of the game, when I finally did I never wanted to touch it again. Ever. Usually when I play a game that much I'll say to myself 'man, I'll do a second playthrough one day.' But not JC2 -- I never want to see another resource item again.

Ah ressource item ! Must collect !!!!!

I'm still playing this fucking game. Great now I feel like playing it again. Not sure if I can make it to 100%, might take a few months. Totally underated game.

If gameplay sessions of Just Cause 2 last for more than 8 hours, please consult your doctor right away.
 
 
PS: You won't stop playing until you've gotten to the point where you're like "I can get that 75% completeion trophy!". Then you wear yourself out on the game when you realize that it's hard to get money for all those jets you're getting from the black market without Story missions.

That fucking game.   
 
It probably stole a good month of my life. Really, really good sandbox game.