Here is the full list of all 13 Workaholic achievements.
Open Workaholic
Get 50 kills
Get 200 kills
Get 1000 kills
Complete a run in 15 minutes
Complete a run in 10 minutes
Earn 50 000 in a single run
Earn 100 000 in a single run
Go Bankrupt
Use all weapons in a single run
Complete a run using the finger gun only
Kill the boss
Reach a x6,5 combo multiplier