The Map Pack 1 Add-on for Sanctum has 9 achievements.
Survive all the waves on Aftermath.
Find the Robot buddy on Aftermath.
Survive all the waves on Aftermath on Insane difficulty.
Survive all the waves on Aftershock.
Survive all the waves on Aftershock on Insane difficulty.
Survive all the waves in Cavern.
Survive all the waves in Cavern on Insane difficulty.
Survive all the waves on Slums.
Survive all the waves on Slums on Insane difficulty.