Achievements rules explained

• A maximum of 1750 points and 80 Achievements for a full retail title. The Orange Box's 99 achievements seem to be grandfathered in, although it's an open question if they'll be allowed to add more achievements should a Team Fortress 2 update come to Xbox 360.

• A quarterly maximum of 250 points and 10 Achievements for any additional DLC associated with that title. Additionally, these totals are cumulative, so a company could wait three quarters to do a large expansion with 30 achievements and 350 points, or parcel them out in smaller additions. X360A says its source explained the rule is meant "to stop companies from releasing a whole slew of content immediately after a game's release to hit its 1750 max right away."

http://kotaku.com/5228296/the-rules-for-360-achievements-partially-explained
http://www.xbox360achievements.org/news-1178-The-Current-Achievement-Rules-Explained.html

So now we know, eh Slazo. e_e

OB technically was 5 games in 1 - so by right it should be allowed to break the rule