We all know games where the protagonist of the first game becomes the antagonist of the later game, but do we know any games where the orginal antagonist becomes a protagonist in a latter game?
I'll start: Silent Hill
>Alessa
>protagonist
>>384693475
Heather is literally the very reincarnation of Alyessa just as Cheryl before her was. They are all genetically the same person.
Do prequels count?
Because MGS has a noticeable case of that.
The Arbiter in Halo 3, assuming you can even consider him an antagonist in H2.