Here is the full list of all 17 Insanely Twisted Shadow Planet achievements.
Reached the 9th arena in Lantern Run.
Found all artifacts.
Scored one million points in Lantern Run.
Defeated the first boss in Shadow Hunters.
Defeated two bosses during one match in Shadow Hunters.
Defeated four bosses during one match in Shadow Hunters.
Score 250,000 points in Shadow Hunters.
Score 500,000 points in Shadow Hunters.
Completed the game.
Uncovered 100% of the map.
Fully upgraded your ship.
Completed the electrical zone.
Completed the mechanical zone.
Completed the ice zone.
Completed the ocean zone.
Completed the organic zone.
Completed the homeworld.