This is the Grand Challenge, a challenge to visit every Planet and Moon in the Kerbol system. To successfully complete this challenge, the player must launch a ship from Kerbin orbit, and plant a flag on every planet* and moon. There will be several versions of this challenge, none easy. However, all variations of this challenge will allow the use of landing ships, but the lander is not allowed to return to the mothership until it has landed on all the moons. Version 1: Stock System This first version of the challenge is to only land on planets and moons in the stock system. Players must first land on Moho, then move outwards through the system, ending at Eeloo. This includes landing on Kerbin again. The other requirement for landing is that players must move outward through a planetary system with multiple moons. For example, after departing from Eve orbit, players must proceed to Kerbin orbit, land on Kerbin, then land on the Mun, followed by Minmus. Version 2: Planet Factory This variation of the challenge is identical to the first, except that to complete this version, the player must land on all planets* and moons available in Planet Factory. For an added challenge, try to complete without landers, not required though. Rules! Lovely Rules! -Orbital assembly is permitted. I'm not that evil . -Mods are permitted within reason. No interstellar mod or FTL drives in any way. Ions are permitted, sublight permitted within reason. Please use your best judgment. -Have fun! (Most important) -For planets with more than 3 moons, the requirement for landing on all moons does not apply. Feel free to ask any questions, and I'll try to answer it. *Except for those planets that can not be landed on, such as Jool.