DLC packs for Xbox 360 titles Stacking and Costume Quest are currently free on the Microsoft Store, with both XBLA add-ons having additional achievements. Get them for nothing while you can!
There has been an odd influx of unexpected 360 freebies lately, with this Double Fine duo being the latest batch. Still, it's probably worth grabbing them now as we can't be sure whether this is a permanent 100% discount or a temporary one.
Free DLC for Xbox 360 games
The Lost Hobo King
In the Lost Hobo King, the first DLC pack for Double Fine’s Stacking, players journey to the hobo kingdom of Camelfoot in attempt to pass three tests of valor to awaken the hobo blacksmiths of old. Overcome challenges, discover unique dolls and hi-jinks to reforge the lost crown for a new hobo king who will unite the fractured hobo people.Reclaim the crown of Camelfoot!
Costume Quest: Grubbins on Ice
Continue the Costume Quest adventure by exploring the monster world, Repugia. Face new enemies while collecting additional quests, costumes, battle stamps and creepy treat cards. Help the monsters overthrow Araxia to bring peace back to Repugia! Unlock now!
Costume Quest's Grubbins On Ice DLC adds five achievements for 50 Gamerscore, while Stacking's The Lost Hobo King adds the same amount of Gs but with one less achievement to unlock.
These could very well be permanent discounts (like the Metal Gear Rising: Revengeance DLC), but you might want to grab them now just in case if you own the base games. Which you likely do.