Here is the full list of all 13 Crazy Oafish Ultra Blocks: Big Sale achievements.
– Win a round
- Kill 100 people
- Collect 10 Playkubes
- Buy 5 items
- Kill a man
- Kill 500 people
- Buy 20 items
- Test injection gun in 15 people
- Test injection gun in 25 people
- Beat the game on Hardcore difficulty
- Finish 10 rounds
- Dance 20 seconds