Here is the full list of all 50 Angry Waifu achievements.
Fail 4 times
Kill 50 enemies
Get 500 money
Make 1K damage
Buy 2 upgrades
Fail 1 time
Make 100 damage
Kill 10 enemies
Get 50 money
Perform 10 attacks
Play for 1 time
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Perform 100 attacks
Perform 1K attacks
Perform 10K attacks
Perform 100K attacks
Perform 5 critical attack
Perform 50 critical attacks
Perform 250 critical attacks
Perform 1250 critical attacks
Perform 6250 critical attacks
Make 10K damage
Make 100K damage
Make 1M damage
Fail 16 times
Fail 64 times
Fail 256 times
Kill 250 enemies
Kill 1250 enemies
Kill 6250 enemies
Get 5K money
Get 50K money
Get 500K money
Play for 5 times
Play for 25 times
Play for 125 times
Play for 625 times
Play for 1 hour
Play for 2 hours
Play for 4 hours
Play for 8 hours
Play for 16 hours
Buy 10 upgrades
Buy 50 upgrades
Buy 250 upgrades
Buy 1250 upgrades
Collect all kittens
Collect all puppies
All upgrades level 100
Complete level 100