100 Things You Never Knew About Resident Evil
11. Code: Veronica Is Incredibly Important
There has always been a debate about whether or not Code: Veronica should be treated as a spin-off or, despite not falling into the naming convention, a mainline title. Whilst many wrongfully believe it was originally conceptualised as Resident Evil 3, there's still an argument that it deserves that elusive "numbered title" status.
Aside from fleshing out the Umbrella corporation and bringing Chris and Claire together, it also gave us the T-Veronica virus which would go on to be a huge player in the lore of Resident Evil.
The pathogen was extremely harmful to the infected, which is why Alexia Ashford needed to sit in suspended animation for 15 years with it, and why Darkside's Javier Hildalgo was going to the extreme lengths of replacing the ravaged organs of his infected daughter's body to keep her alive. That said, it was Resident Evil 6's Carla Radames that made it work. By editing the code and combining it with trace elements of the G-Virus found in Sherry Birkin's blood she was able to create the C-Virus (or "Crysalid Virus"): a mutagenic that allowed rapid transformation with very little drawback.
Of course, it's RE6 so this is all very poorly explained on-screen, but the long and short of it is that RE6 can't happen without Code: Veronica.
So, in retrospect, if you hate RE6 you might have a new reason to also hate Code: Veronica.