Base rising from 200 to 400 with 800 max with DLC
Sources are confirming that Microsoft is raising the max gamerscore limits for Xbox Live Arcade titles starting on June 1st. In addition, developers will be able to have a little more flexibility for DLC add-ons over the life of the arcade title, which means more Achievements with a new possible max cap of 62 with DLC add-ons.
If correct, the base Gamerscore for an Xbox Live Arcade title will move from 200 points/20 achievements to 400 points/30 achievements. With DLC allowing for another eight achievements per quarter (with a max of 100 points for a maximum of four quarters) this provides a new total of 800 maximum per Xbox Live Arcade title with max cap of 62, which is quite a jump from the old max of 35.
The additional gamer score addition is voluntary for releases coming between April 1st and May 31st ; but starting June 1st this will be the new norm for Xbox Live Arcade Gamerscore and Achievements going forward.