Avatar- the mark of the achievement wh***, it's on my list. ![Big Smile [:D]](/emoticons/emotion-2.gif)
TMNT- I enjoyed this game. but I loved the turtles growing up. 4 hours, 1000GS.
NBA 2K6- you can get all 1000 in one game, 5 minute quarters. 20 minutes=1000GS.
Open Season- take 4-5 hours. is pretty enjoyable for a childrens game as well. one level is tough, Snow Blitz, but everything else is gravy for the 1K.
Lost: Via Domus- you may want to avoid this if you don't like the show. but with a guide, you can get 1K in one playthrough, which will take you about 4-4 hours as well.
Spider-Man: Friend or Foe- like mindless fighting? this is another easy 1K. I'm a Spidey geek, so I liked it (a little)
King Kong- play through the game, it's yours. I didn't play it, but my GF beat the whole game. can't be that hard.
Superman Returns- if you like comically bad games, getting the 1K isn't too hard with some help from a guide. I haven't 1K'ed it, I got bored.
Cars/Cars: mater nationals- haven't played them, but I heard it's pretty easy and quick.
Fight Night Rd 3- play through the game, you get the 1K.
those are some of the regulars I hear, or have played that don't take a ton of time to get the 1K and boost your score up.