Here is the full list of all 20 DEDstress achievements.
Install and open the game
Win the game on any difficulty
Win the game on very hard
Embrace a DED treatment doll
Escape the basement after accepting Oom's offer
Escape the basement after declining Oom's offer
Steal the Halcyon statue
Incinerate Dr. Goudbroek with his own braai
Interact with all radios, televisions and answering machines
Inject yourself 50 times
Open 20 Skinner Boxes
Reach stage 5 in arcade mode on any difficulty
Reach stage 10 in arcade mode on hard difficulty
Reach stage 10 in arcade mode on very hard difficulty
Reach stage 20 in arcade mode on very hard difficulty
Die by injecting yourself
Successfully enter 20 codes
Open the elevator without Lyndie's help
"Save" that bos oke from the terrors of the first floor
Steal Dr. Goudbroek's prized potjie