Microsoft has pinpointed a group of players who have unlocked specific Gears of War 2 Achievements through an unauthorized hack. These players will be penalized.

Here's a quote from Major Nelsons Blog about these cheaters:

"As you know, we are committed to keeping Xbox LIVE a safe and fair place to play for the more than 17 million active members. As part of our regular safety monitoring we have pinpointed a group of players who have unlocked specific Gears of War 2 Achievements through an unauthorized hack. Deliberate cheats like these are in direct violation of the Xbox LIVE Terms of Use and will not be tolerated. As I post this, we’ve begun taking steps to reset the Gamerscores of the offending players."

According to the Microsofts gamescore policy, a LIVE player who obtained their gamerscore in this abnormal way will

• Find their gamerscore reset to zero, and
• Be unable to regain all previously earned achievements, and
• Be labeled as a “cheater” for the community to view.