血 第一人称射击 第一人称射击 快节奏 死亡 2.5D 跑动射击 迷宫 兔子 新潮的 徒手对抗 恶魔 Steam 传送 heavy metal one-man army darkness BOSS 战 爆炸 数字发行 Steam 云记录 世界地图 demon invasion 人类 查看全部 + 流行文化提及 wasd movement corpse sprinting mechanics auto-aim 混战 stat tracking instant kill invisible enemy vision obstruction 困难关卡 quicksaving rock music moving platforms recurring boss been here before harder versions of earlier levels tentacles temporary invincibility griefing invisibility jumping puzzle satanism hidden room secret areas within secret areas another world crowd control no-reticle aiming selective invincibility lost soul dial-up wide area network game operation male protagonist