In the latest issue of Japanese publication Famitsu, Resident Evil 2 director Kazunori Kadoi, team director Yasuhiro Ampo, and producer Yoshiaki Hirabayashi provided a few more details about the return of the survival horror classic, including the a secret mode. Hirabayashi said, Other than the already revealed The 4th Survivor and The Tofu Survivor, there is something I cant talk about, but if I say it anyway, its something we made that can make subsequent playthroughs fun.
Source: N4G PC What is the Resident Evil 2 remakes secret mode?