Here is the full list of all 69 Idle Expanse achievements.
Logged 1k hours of gameplay
Unlock all other achievements
Collected 100 time crystals from the chroniton collector dish
1T credits earned
Purchased 1000 weapons
Completed 1k contracts
Purchased 1000 pieces of gear
10k inversion points earned
1B credits earned
1k inversion points earned
Logged 100 hours of gameplay
Zapped 1k AstroRabbits(TM)
100 inversion points earned
Reached maximum merc level of 30
Hired 100 mercs
Purchased 100 pieces of gear
Completed 100 contracts
Purchased 100 weapons
10 inversion points earned
Killed 1k bosses
It's like New Game+ right?
Killed 10k enemies
Hired 25 mercs
Unlocked new planets!
Leveled a merc to level 20
Achieved 1000 credits per minute
Leveled a merc to level 15
1M credits earned
Killed 100 bosses
Clicked 1k EXP clickables
Leveled a merc to level 10
Killed 1k enemies
Which reality is best?
Achieved 100 credits per minute
Leveled a merc to level 5
1K credits earned
Time to go AFK!
Unlocked the home base defense lazer
That tutorial is way too long!
Unlocked a new planet!
Let the adventure begin!