Genius Corpse-Collecting Warrior is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

It has already been two years since I possessed a character in this insanely difficult game. In order to go back to Earth, I have no choice but to stop the downfall of this world and reach the ending of this game. [You have collected the body of a “pathetic soldier.” Inheriting abilities.] [Inherited rewards: Stamina +1, Proficiency +1, Dehaman’s Armored Combat (D)] I will see through to the end of this game no matter what!