Full list of all 23 Red Death achievements worth 2,000 gamerscore. It takes around 0.5-1 hour to unlock all of the achievements in the base game on Xbox One.
The base game contains 18 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 5 achievements worth 1,000 Gamerscore.
Beat highscore of 80,000
Deploy 5 overloads
Kill 4 bosses
Deploy 3 overloads
Kill 2 bosses
Deploy 1 overload
Kill 180 enemies
Lose 18 ships
Beat highscore of 40,000
Beat highscore of 20,000
Kill 1 boss
Collect 20 pickups
Kill 90 enemies
Lose 9 ships
Collect 10 pickups
Kill 30 enemies
Lose 3 ships
Collect 5 pickups
Kill 6 bosses
Kill 400 enemies
Kill 300 enemies
Collect 40 pickups
Collect 30 pickups