Here is the full list of all 142 Stellar Interface achievements.
Killed 1000 bosses.
Had 20 active drones.
Used all consumables at least once.
Flew for 3h with each spacecraft.
Completed 20 different silver missions.
Completed 10 different gold missions.
Visited 1000 regular levels.
Visited 25 Overlords.
Used all softwares at least once.
Flew for 2h with each spacecraft.
Killed 100000 enemies.
Killed 500 bosses.
Used consumables 1000 times.
Cleared 1000 levels.
Died 1000 times.
Stocked up 20 cartridges without using them
Flew for 1h with each spacecraft.
Died 500 times.
Played for one day.
Visited 100 Lost Lords.
Used consumables 500 times.
Proved that you are the strongest of them all, 5 times.
Proved that you are the strongest of them all, 3 times
Killed 100 bosses.
Killed 50000 enemies.
Visited 500 regular levels.
Played for 20 hours.
Died 200 times.
Proved that you are the strongest of them all.
Visited 100 merchants.
Cleared 500 levels.
Visited 50 Lost Lords.
Defeated Homunculus 5 times.
Completed 5 different gold missions.
Completed 20 different bronze missions.
Killed 50 bosses.
Defeated Homunculus 3 times.
Died 100 times.
Cleared all levels 5 times.
Cleared all levels 10 times.
Cleared all levels 20 times.
Cleared all levels 50 times.
Completed 10 different silver missions.
Played for 10 hours.
Defeated Homunculus 1 time.
Killed 20000 enemies.
Have 10 active drones.
Defeated Space Winner 5 times.
Defeated The Hive 5 times.
Defeated Space Winner 3 times.
Defeated Space Winner 1 time.
Visited 10 Overlords.
Died 50 times.
Installed 80 different softwares.
Defeated The Hive 3 times.
Cleared 200 levels.
Killed 20 bosses.
Defeated Hober Mallow 5 times.
Completed 5 different silver missions.
Coated some iron in your skin, then electrified it.
Unlocked Stag.
Unlocked Star Fury.
Played for 5 hours.
Unlocked Eagle.
Defeated Hober Mallow 3 times.
Used consumables 100 times.
Visited 10 Lost Lords.
Killed 10000 enemies.
Completed 10 different bronze missions.
Visited 100 regular levels.
Cleared all levels 2 times.
Defeated The Hive 1 time.
Accumulate at least 10 usages of a single consumable.
Cleared 20 levels in a single run.
Unlocked Dove.
Cleared 100 levels.
Cleared all levels 1 time.
Killed 10 bosses.
Defeated Hober Mallow 1 time.
Had Joy, Capitalist Consumerist, Salty Elixir and Cloverleaf installed at the same time.
Unlocked Lily.
Died 10 times.
Unlocked Kilgore.
Completed all missions in a run.
Installed 50 different softwares.
Used consumables 50 times.
Visited 10 merchants.
Killed 5000 enemies.
Completed 5 different bronze missions.
Cleared 50 levels.
No damage taken in 3 consecutive levels.
Visited your first Lost Lord.
Unlocked Erebus.
Played for 1 hour.
Used consumables 10 times.
Installed 25 different softwares.
Completed a level without any casualties.
Visited your first Overlord.
Killed 1000 enemies.
Installed 10 different softwares.
Visited 10 regular levels.
Cleared 10 levels.
Killed 500 enemies.
Ate two meals.
Installed 5 different softwares.
Killed 100 enemies.
Unlocked Corvette.
Visited your first merchant.
Killed 10 enemies.
Visited 1000 merchants.
Visited 50 Overlords.
Visited 100 Overlords.
Visited 2000 regular levels.
Installed quintuple projectiles and quintuple radial projectiles.
Got your projectiles 2x bigger and your spacecraft 2x smaller.
Cleared 2001 levels.
Completed all bronze missions.
Completed all silver missions.
Completed 20 different gold missions.
Completed all gold missions.
Obtained all badges in all spacecrafts.
Unlocked all achievements!