Here is the full list of all 18 The Harvest achievements.
Destroy the Area 2 boss - Enki
Increase one of your basic stats to 50
Collect 1000 energy points from your fallen foes
Kill 100 Enemies
Reach XP level 10
Collect all 10 BB-7 Recorders
Hit 3 enemies at once with a Condor Mine
Escape from the crash site bunker
Complete the game without dying
Complete the game in 4 hours or less
Complete the game with all 5 character classes
Use the Speed Boost to hit 3 enemies at once
Attack 3 enemies with Wind Walk activated
Destroy the Area 3 boss - Kingu
Destroy the final boss
Use the EMP to freeze 3 enemies at once
Hit 3 enemies at once with the line laser as Raptor
Collect 10000 Plasma