From Wikipedia, the free encyclopedia
Mark Rein may refer to:
- Mark Rein (journalist) (1909–1937?), Menshevik journalist
- Mark Rein (software executive), vice president and co-founder of Epic Games
- Mark Rein (creative director), Founder and President of Peace Armor.
- Mark Rein-Hagen, role-playing, card, video and board game designer
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