This week on XBLA we see the arrival of 2 new games (something that didn't happened in a lot of time), namely Rocky and Bullwinkle and Battlezone.

Rocky and Bullwinkle will be available for 800MSP, while Battlezone will set you back 400 MS.

Both titles will be available this coming Wednesday, April 16th, at 9:00 am GMT.

MyGamerCard reveals the complete list of achievements for the upcoming XBLA title Ikaruga.

11 of the 12 achievements in the game are the standard for a shoot-em-up title (to be honest, they could have been more original about them), with 5 achievements awarded when you beat each of the game's bosses (10-15G each), 5 for getting a good score on each stage (20G each) and the last 2 awarded when you beat the game without continues (15G) and the other when you finish a stage without shooting (10G).

 

From: Inside MyGamerCard

UPDATE:
Looks like the MyGamerCard website has info about the achievements of some other XBLA titles:

Battlezone
Mr.Driller
TiQal