You get the lost in space achievement by combining the bomb and the explosive potion and put it on the ships power core/ generator you must also use the astronaut suit , decompress the airlock (were you started) via the control panel in there by closing the door and decompressing the room then opening the exterior door and going out there then you open the little warning thing and pull it out and go to the asteroid area then you click on some of the debris until you find the a crystal. Then you go back inside and close the exterior door and pressurize it again. Then you open the interior door and leave and put the bomb on the ship's power core. Then you detonate. I think you need to get the captains access card and turn off the safety protocols so you can get out.
 "50 years (graphical)"){kind=icon}
 "Don't Escape 3"){kind=icon}
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