Kamen No Mono

Kamen no Mono: A 3d third-person melee combat game in which a masked samurai must eliminate the members of the conspiracy of the green dragon, which intends to take over the government of Japan using dark magic. Various talismans can be acquired to grant you powers if certain challenges are completed. After beating one of the lead members of the clan, you attain a new mask, which increases your powers permanently.

W, A , S, D to move around 

TAB to attack

Mouse 1 to Click on inventory, and masks inside the inventory(note mouse is not locked to the game)