Here is the full list of all 14 Intrusion 2 achievements.
Complete game on high difficulty
Harpoon mech FTW
Shake Shake
Defeat the MACE
Smash enemies
Find the Relic
Get the stalker trapped
Get rifle mech to the end
Get sword mech to the end
Defeat them
Burn enemies
Feed the fish
Defeat the Grabber
Perform headstomp