Metal Hellsinger is the latest game with an uncertain future amid the ongoing controversy around a new Unity fee policy introduced by the game engine creator. David Goldfarb, founder of Metal Hellsinger maker The Outsiders, joins an increasing list of game developers citing uncertainty about their games’ future. The Doom-style rhythmic FPS game made a big splash last year with its original soundtrack featuring notable metal bands such as Trivium, Arch Enemy, System of a Down, and Lamb of God.

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