Full list of all 33 Project Starship achievements worth 4,000 gamerscore. It takes around 0.5-1 hour to unlock all of the achievements in the base game.
The base game contains 18 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 15 achievements worth 3,000 Gamerscore.
Collect 50 pickups
Kill 4 bosses
Lose 24 shields
Collect 25 pickups
Encounter 6 mad events
Lose 16 shields
Kill 300 enemies
Kill 2 bosses
Encounter 3 mad events
Beat highscore of 100,000
Beat highscore of 10,000
Beat highscore of 50,000
Kill 100 enemies
Collect 5 pickups
Lose 8 shields
Kill 1 boss
Encounter 1 mad event
Kill 25 enemies
Lose 50 shields
Lose 40 shields
Lose 32 shields
Kill 400 enemies
Kill 500 enemies
Lose 66 shields
Kill 650 enemies
Lose 58 shields
Kill 550 enemies
Kill 600 enemies
Kill 900 enemies
Kill 850 enemies
Kill 800 enemies
Kill 750 enemies
Kill 700 enemies