I just heard about a sequel to Mega Man Zero for the GBA called Mega Man Zero 2. Now I understand that there may not be a good way to show that this game is a sequel to MMZ without calling it MMZ2, but it still sounds silly.
That got me thinking about other games that had strange sequel numbering. Games like Final Fantasy X-2 and Jedi Knight 2 (since Jedi Knight was the sequel to Dark Forces, Jedi Knight 2 should technically be called Dark Forces 3) came to mind almost immediately. I remember that when I first heard about Rogue Spear, I was afraid they'd call it "Rainbox Six 2"
Are there any other game sequels out there that have similar problems with numbering?
[size=9]PS. I thought calling the X-Men "Special Edition" X-Men 1.5 was pretty clever, but it's not a game, so it doesn't count...[/size]