Here is the full list of all 30 Isomer achievements.
Watch an enemy unit loot an alien weapon from a corpse and equip it
Kill 25 enemy Heavies
Plant 10 biomass seeding trees
Collect 500 biomass from plants
Trigger an alarm in an enemy base
Disable your first enemy base
Kill 100 enemy engineers
Collect 1000 rare minerals
Have a unit drown
Loot 100 corpses
Loot 50 weapons
Find 5 loot crates in enemy bases
Loot 10 resource cache crates
Reveal the whole world from a loot crate
Loot 5 promotions from crates
Trigger a trapped resource crate
Cause 500 secondary explosions
Plant 20 proximity mines
Kill and enemy unit with a proximity mine
Reach the bottom level of the world
Have a unit reach the maximum promotion level
Changing the equipped weapon of a unit ten times
Equip 5 human heavy weapons
Kill 50 enemy soldiers
Kill 250 enemy heavies
Kill 500 enemy soldiers
Kill 1000 enemy engineers
Save your powercore from 5% integrity
Trigger 50 enemy base alarms
Disable 5 base alarms