Well here we go ! Lets hear it about the games we completed and I even put notes on what to type. Lets have nice big long list throughout the year of what you enjoyed.
Yes the notes are long this this post

1. When listing new games, make sure to make a new post in the thread and not just edit your last list.
2. Completion does not mean that you have to do X, Y, and Z for it to be completed. Completion is whatever you consider finished, whether that is just beating the game, getting every achievement, or unlocking every single item.
3. Games released via digital distribution count too! You can list XBLA and PSN games separately.
4. If you beat a game that you've beat in the past, it still counts! The list is for games completed in 2010, regardless of previous completion.
5. Some "games" are actually compilations, such as Sonic Mega Collection and The Orange Box. Since there are multiple games, please list each of them separately.
6. If the game is multiplayer only, it's hard to actually complete it. If you want something like Team Fortress 2 to count, make sure it's some goal like "got all achievements" or "raised skill rank to 50" and note it in your list.
7. Downloadable content can count, provided it's a full expansion on the level of The Elder Scrolls IV: The Shivering Isles. If the DLC merely additional missions that are integrated into the regular game, such as the "Bring Down the Sky" DLC for Mass Effect, then it doesn't count as a separate game.
8. Please list the console you played it on!
9. Remember, this isn't a competition. This is just for fun. We're not here to compare our e-peens.