I Traveled Through Biochemical and Became the Nemesis of Biochemical

Time travelers always like to compromise. If you ask them to go to the world of Resident Evil from the beginning, they will definitely cry and howl, saying that they don't want to go. But if you ask them to go to the world of Warhammer 40,000, then the world of Resident Evil seems to be acceptable.

(It's just a clichéd story about a fusion of Resident Evil and Counter-Strike Online. There won't be any magical weapons, so that's it.)