Here is the full list of all 26 Outpost: Infinity Siege achievements.
Unlock all departments.
Run at the human speed limit.
Reach level 30.
Recover items worth 3000R in a single Recovery.
Clear level [Rescue] for the first time.
Clear level [Outpost 11] for the first time.
Deal more than 5000 damage in a single instance.
Clear level [Into the Abyss] for the first time.
Save a missing operative.
Open a locked container using a lockpick.
Exploit Kronos' weakness and make him kneel down.
Clear level [The Nebulas] for the first time.
Clear level [Seraph] for the first time.
Reach an Outpost value of 10000.
Reach an Outpost value of 50000.
Reach an Outpost value of 100000.
Complete 100 Recovery Days.
Complete all research projects.
Defeat 5000 enemies by hitting the weak spot.
Defeat Kronos for the first time.
Defeat Crius for the first time.
Explore 10 different landmarks.
Defeat a Bomber using melee.
Do not touch the ground for more than 30 seconds.
Have a single round cost of more than 150.
Complete recovery after 15 Exploration Days.