The PC version of the upcoming survival horror title didn't enter development until after the console versions were completed.
"It is a small, but appropriately sized team working on the RE6 PC project," writes Capcom's Christian Svensson on the firm's Unity site.
"It is a different group than originally planned, lest it would have taken even longer than it currently will but this team will do a better job than what was being considered originally.
"The process did not begin until after the console versions were complete, submitted, approved by console 1st parties to use that final codebase as the starting point.
"It will be some time still before we provide details on release dates and PC specific parameters."
He added: "Projects like this you guys seem to think are 'trivial' but they are not. When they get treated as trivial, you end up with Resident Evil 4 PC... which I don't think too many true fans were pleased with."
A Resident Evil 6 demo was made available to Xbox 360 and PS3 users earlier this week.
It follows an earlier demo released to Dragon's Dogma users earlier this year.
Announced in January, Resident Evil 6 is set 15 years after the Raccoon City incident and takes place in the infected town of Tall Oaks, as well as China.
Capcom recently confirmed an unlockable Ada Wong campaign and unveiled a Left 4 Dead-inspired 'Agent Hunt' mode.
The game is the firm's largest ever production, with more than 600 staff involved in its development.
Resident Evil 6 will be available on Xbox 360 and PlayStation 3 on October 2. The Xbox 360 version will ship on two discs.
Watch a trailer for Resident Evil 6's online companion site below: