Here is the full list of all 18 Dog Brew achievements.
Repay all credit to Rex
Brew 100 bottles of beer
Brew 500 bottles of beer
Brew 1000 bottles of beer
Contaminate the fountain
Sell beer for 100k
Sell beer for 500k
Sell beer for 1kk
Sell plant for 1k
Sell plant for 5k
Sell plant for 10k
Sell fish for 10k
Sell fish for 50k
Sell fish for 100k
Win 250k total in slots
Win 500k total in slots
Win 1kk total in slots
Jump onto the store from the hill