Here is the full list of all 23 MEGALAN 11 achievements.
Finish repair of the essential base equipment
Find the pyramids
Successfully leave the planet
Collect 500 repair parts
Collect 2500 repair parts
Collect 5000 repair parts
Use a taser
Fill the bag to the top
Activate ventilation system
It was a tough one, but you did it!
One member of crew is unconscious
Someone turned off your energy system
Have three defense elements
Have four defense elements
Have six defense elements
Collect all 4 music records
Travel outside of base for an entire day
Use all 3 energy elements
Get a eight hour sleep
Destroy 1500 objects. That is almost all of them
Turn on the lights
Finish game on hard difficulty
Find path to the local structures without communication cabin. Turn off the power