Mark Rein·Hagen, role-playing, card, video and board game designer
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Vampire: The Masquerade (1991) and Over the Edge (1992) followed, which were written by Ars Magica designers Mark Rein-Hagen and Jonathan Tweet respectively, the pair having been impressed by the potential of the dice pool mechanic and each having decided to make their own game based on dice pools.
In an attempt to branch out, Mark Rein·Hagen, creator of the Vampire: The Masquerade role-playing game, founded Atomoton, a company that would focus more on collectible forms of gaming.