Into The Black: Rise of The Spider King

When the interdimensional gates that supplied the world vanished humanity descended into chaos. After being killed in battle Yang, an Army Telecom Technician, and the rest of his unit are scattered through space and time.

When he sells his soul to an interdimensional spider demon Yang awakes in a world of magic and swords. With the help of some unlikely allies, he must track down his fallen comrades and solve the mystery of gates. Maybe overthrowing a monarchy or two in the process.