Full list of all 17 Sanctum 2 achievements worth 500 gamerscore. It takes around 30-35 hours to unlock all of the achievements in the base game on Xbox 360.
The base game contains 12 achievements worth 400 Gamerscore, and there is 1 DLC pack containing 5 achievements worth 100 Gamerscore.
Complete Facility, Rocky Fields, Giant Trees and Swamp with 5 Feats of Strength enabled.
Beat a Game In A Game.
Complete Facility, Rocky Fields, Giant Trees and Swamp.
Reach rank 20.
Complete The End in a party of four.
Build 20 tower bases.
Reach Rank 10.
Complete a map with a Feat of Strength enabled.
Complete a map with 5 Feats of Strength enabled.
Complete one level with 5 Feats of Strength enabled in Co-op.
Upgrade a tower to the max.
Complete your first map.
Complete Coastline.
Complete Coastline with 5 Feats of Strength enabled.
Complete Brightholme.
Complete Brightholme with 5 Feats of Strength enabled.
Reach rank 30.