Secrets of the Universe

Every chamber on every planet: six each on Sylva, Calidor, Vesania, Glacio and Atrox, two each on Desolo and Novus - 34 in all. Not required for the ending (one per planet unlocks each core), so this is the completionist's lap of the solar system, and comfortably the longest job in the game.

Kit a rover with a drill, batteries and an RTG or two, and circumnavigate each planet. On the six-chamber worlds the chambers sit four around the equator and one at each pole; the moons' two sit on opposite sides. Remember each chamber only joins the teleport network once you've powered it - Now You See Me... gets you home, not out, so the legwork is real. Do your dancing (Galactic Boogaloo) and probe-hunting (The Wanderer's Way) on the same laps.