Right now I'm slowly moving through Fallout 3 and it's a good game but I'm about at that point where most Bethesda games make me lose interest.  I'm finally at a point where I have plenty of ammo, money, and the guns to make any fight pretty easy.  The main quest is at least more interesting to me than Oblivion and I want to keep playing, but I don't know if I'm going to finish it.

So with that in mind, I want a short game to play now.  These are the ones I'm considering:

• Dead Space (PS3) -- I started this one and really liked it, but put it down and never picked it back up.
  
• Call of Duty 4 (360) -- I started this one, got mad that I kept shooting my own guys because they all look the same and put it down.  I actually really want to finish this game because I keep hearing so many great things about it, just haven't yet.
  
• Ico (PS2) -- This game arrived yesterday and I'm pretty excited to play it since I heard so many good things.  One big plus is I happen to have a PS2 in my office and since I'm not doing a lot I could probably play this while at work which would mean I could play one of the other choices at home!  (I know it's already on my Backloggery as currently playing, I just put it there this morning and then really started thinking about what I wanted to play next).
  
• Viva Pinata (360) -- Found it cheap and heard it's fun so I picked it up.
• Killzone 2 (PS3) -- Started it, was fun, but got two game stopping bugs in the first hour-ish of playing and just didn't continue.  Another game I want to finish and possibly even play the multiplayer if I like it enough, just don't think I like it as much as the others on the list.

So which of these games should I play next? 

-edit-

Please don't base any decisions on multiplayer, I'm really not a bug multiplayer person.  I might give the KZ2 or CoD4 multiplayer a go because it's there, but it's not an important thing for me.

I think you should play Dead Space. Just a thought.

Ico 100%

Then post your feelings on the game

Anything that isn't Viva Pinata or Dead Space. Not that they aren't good games, but compared to the others, they are not on the same level.

I haven't had the chance to play a lot of ICO, so from my own experience, I would recommend that you go for Call of Duty 4. It really is an amazing game.

Do you have "Shadow of the Colossus?"

*Edit: Well assuming you do and its in that pile of unplayed games of yours. Play it!! If not, i can comforatbly say ( without playing it ) play Ico.

Killzone!!!!!!!!!!!!!!!!

Finish Call of Duty 4.

I have Shadow of the Colossus and I didn't really think it was anything amazing.  I played it, killed a few of them, and just didn't want to go any further.

You better play COD 4 before Killzone 2 the game hasn't aged well especially right next to KZ2.

ICO and Shadow of the Colossus are overraded games in my opinion. Expect ICO to be average at best.