Master Level - ARC Complex, usually referred to by fans as the ARC Complex Master Level is the second master level for Doom Eternal. It released upon launch of the game, and is automatically available for free to anyone who purchased the game. Later on, an update restricted it to only being able to be played after beating the base level. There are no rewards for beating it, although, added in the SGN Master Level update you do get a badge next to the level modeled after the skull representing the highest difficulty you beat it on. After completing the mission on Nightmare difficulty, it turns gold.
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