Lost Cities, which debuted on Xbox Live Arcade last Wednesday, lives up to its award-winning name by entering the Xbox Live Activity charts as the top Arcade title of that week. You can find out more about Lost Cities by following this link.

Aside from Lost Cities, Battlezone also enters the charts at 9th place. The only new entry in Top Live titles this week is the Iron Man Demo, which bodes well for the release of the actual game. Army of Two has dropped out of the list entirely.

Given these changes, Xbox Live Activity is mostly populated with the usual suspects; mainly the same games that have been in the charts for weeks now. Here's the rest of Xbox Live Activity for the week of April 21:

Xbox 360 Top Live Titles

1. Call of Duty 4
2. Halo 3
3. Guitar Hero III
4. Tom Clancy's Rainbow Six Vegas 2
5. Gears of War
6. Rock Band
7. Iron Man Demo
8. FIFA 08
9. Forza Motorsport 2
10. Madden NFL 08

Top Arcade Titles

1. Lost Cities
2. Ikaruga
3. DOOM
4. UNO
5. Brain Challenge
6. N+
7. Worms
8. Bomberman LIVE
9. Battlezone
10. Sonic The Hedgehog 2

Original Xbox Top Live Titles

1. Halo 2
2. Splinter Cell Chaos
3. Battlefield 2: MC
4. Star Wars: Battlfrnt 2
5. Splinter Cell Chaos
6. Counter-Strike
7. Call of Duty 3
8. Street Fighter Anniv.
9. Madden NFL 08
10. Fable