The
Might and Magic Wiki states that
After defeating Sheltem and his forces on CRON in Might and Magic II, the party of adventurers next find themselves transported to Sheltem`s homeworld of Terra. Here again, the adventurers must aid Corak in stopping Sheltem and putting an end to his evil machinations.
However,
Wikipedia states:
After the defeat of Sheltem and his forces on CRON in Might and Magic II: Gates to Another World, a new party of adventurers from Sheltem's "homeworld" of Terra find themselves embroiled in the battle between the two Guardians.
Based on the default party from MM1 (Crag the Hack, Sir Galand, Zenon III, Swifty Sarg, Serena, Wizz Bane) and MM3 (Crag Hack, Dark Shade, Maximus, Resurrectra, Robert the Wise, Sir Caneghem and Tolberti), I think they are supposed to be different characters.
Now that I actually researched this, I think I've found all of Crag Hack's incarnations: (1) a knight called Crag the Hack in MM1-2, (2) dwarf barbarian in MM3 and MM7, (3) human barbarian in HoMM 1-4, (4) a human barbarian in the HoMM6 DLC Pirates of the Savage Sea, who was briefly mentioned in a HoMM5 cutscene.
And finally, for those who haven't read it, an explanation of why Crag Hack showed up in the first place, quoted from
Jon van Caneghem's Codex Interview:
"Crag Hack" was one of my most played paper AD&D characters. He was a LVL 16 Human Neutral Fighter, 18/00 strength, used 2 one handed swords, acquired Psionics and among other things one of his hands was replaced with the "Hand of Vecna"... it’s a long story
OK, I'm done; we can go back to discussing MMX now.
Edit: I've reread Crag's biography from HoMM4, and if there's one character that epitomizes MM's storied past, it's gotta be him (bonus points for being one of the three heroes present in all the NWC HoMM titles, alongside Sandro and Gem; you can also count Luna, but as a Conflux hero she wasn't in Restoration of Erathia and the vampire in HoMM4 may or may not be her):
Crag Hack will forever remain an opportunist, fighting for pleasure and profit instead of foolish intangibles like ideals or beliefs. Even his narrow escape from the destruction of the old world (NWC) has failed to give him a more profound outlook on life.
Truly a Soldier of Fortune: