Here is the full list of all 24 Pixel Survivor - there are Pixel Up! achievements.
Die your first time!
Unlock your first powerup
Unlock the 5th Powerup
Unlock the 10th powerup
Unlock the 15th powerup
Grow a lil
Grow a bit more
That's what she said!
Lose a big branch!
Last 5 minutes
Last 10 minutes
Last 15 minutes
Last 20 minutes
Last 25 minutes
Last 30 minutes
Equip 1 permanent upgrade
Equip 5 permanent upgrades
Equip 10 permanent upgrades
Get 10 dices
Get 25 dices
Get 50 dices
Collect 50 coins
Collect 100 coins
Collect 1000 coins