Operation Market Garden, an Allied aerial assault on the Muese and Rhine rivers during the Second World War, was a disaster. Thousands killed, thousands captured. So let's celebrate its anniversary with free achievement points!
Yes, if you drop a copy of Brothers In Arms: Hell's Highway (which depicts events from Market Garden, obviously) into your 360 and sign into Xbox Live before midnight (so while it's still September 17), you'll be rewarded with 50 GP. You don't even have to play the game, just spin up the disc.
You stay classy, Ubisoft.