Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Dev is in the Details	Beat the devs score of 26161 in Arcade Mode in a single run with any character.
Part Time Plumber	Kill 1000 enemies by stomping on them.
Perfect Ten	Get 10 Flawless badges in Campaign Mode.
Spells on Other Demons	Unlock The Wizard in Arcade Mode.
What Fresh Hell	Defeat The Stale in campaign mode.