Full list of all 12 Tower of Guns achievements worth 1,000 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox One.
Unlock all the Guns
Finish a 100th run
Finish a 50th run
Unlock all the Perks
Die while a Boss is Exploding
Finish a 10th run
Jump and Remain Airborn for 45 Seconds
Finish the game (non uberwin)
Kill over 350 Enemies in a Single Level
Tilt 10 times in a row
Unlock a weapon
Beat a boss