In Parasite Eve 2 (2000), is not a boss name but a mutation stage of Neo-Mitochondrion creatures. Specifically:

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This article serves as the ultimate , exploring both the metaphorical parasites of society and the literal parasites in the human gut.

: Meet Markus at the Adventurer’s Guild in the Marketing District.

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The game is generally divided into three main "Routes" based on your early-game interactions: The Resistance Path (Good/Neutral) : High Sanity, Low Infection. Key Choice