[Update] Rumour: XBLA Titles To Recieve Achievement Upgrade

UPDATE – Major Nelson has since confirmed this via his blog –

Starting next month (April 2012) all new Xbox LIVE Arcade games will have the option to increase from 200 to 400 Gamerscore points, with the addition of up to 30 Achievements. Even better, this Gamerscore increase will be required in all new Xbox LIVE Arcade games starting in June 2012.

In the very near future Microsoft will allegedly raise the overall Gamerscore and number of Achievements allowed for Xbox Live Arcade titles. Achievement guru; Xbox360Achievements.org reports that the base Gamerscore allotment will be raised from 200 to 400, with a max of 30 Achievements available per title instead of the usual 20. Downloadable content will also receive some more flexibility, doubling the potential Gamerscore allowance to 100, with up to eight Achievements per quarter, with a max of four packs allowed over time.

These new rules will apparently come into effect between April 1 and May 31, with titles launching during that time having the option of going by either the old or new system, all games after June 1 will be required to follow the new rules.