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