Complete the following Secret achievements to collect their Xbox Live Gamerscore points.

Achievement	How to unlock
Back Where You Belong (20 points)	Beat Land of the Undead on any difficulty.
Brawl to the Wall (20 points)	Beat Battlebrawl Island on any difficulty.
Chicken Bites (20 points)	Beat Cap'n Cluck's Chicken HQ on any difficulty.
Cloud Kingdom Clearer (20 points)	Beat The Cloud Kingdom on any difficulty.
Demolition Derby (20 points)	Beat Ridepocalypse Demo Derby on any difficulty.
Jail Break (20 points)	Beat The Rift to Skylands on any difficulty.
Knowledge Is Power (20 points)	Beat The Spell Punk Library on any difficulty.
Light Giver (90 points)	Defeat The Darkness on any difficulty.
Power of Attraction (20 points)	Beat Vault of the Ancients on any difficulty.
Raiding the Raiders (20 points)	Beat The Bandit Train on any difficulty.
Sock Sniffer (20 points)	Beat The Cloudbreather's Crag on any difficulty.
Vacation Getaway (20 points)	Beat Monstrous Isles on any difficulty.
Yard Work (20 points)	Beat Gadfly Glades on any difficulty.