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