Here is the full list of all 12 Enter Digiton: Heart of Corruption achievements worth 1,000 gamerscore.
Destroy 200 obstacles
Die 24 times
Kill 48 enemies
Die 12 times
Open 5 doors with a key
Kill 24 enemies
Destroy 75 obstacles
Die 6 times
Open 2 doors with a key
Kill 6 enemies
Destroy 25 obstacles
Open 1 door with a key