for this achievement you must get into the Moon Rover and basically drive to the different alien bases throughout the game. To do this, press the
button to get into the Moon Rover. You will notice gaps on the floor preventing you from going forward. to "fix" these gaps, get out of the rover and press
until you are holding a pink bridge. with the bridge in hand, press
once you are on top of the gap to seal the gap with the bridge. continue on "fixing" the gaps on your way to the alien bases and you will soon unlock the achievement.