There's not much to prep for when you're playing as a non main character from the original Resi series. Play Resi 1, bam, you've gotten to know Chris Redfield.
With the way 8 is written, what theme it's going for an it's scenic setting, you'll hardly need much if any specific knowledge of past Resi games.
Mankind, in its arrogance and self-delusion, must believe they are the mirrors to God in both their image and their power. If something shatters that mirror, then it must be totally destroyed.







