Rein-Hagen and Jonathan Tweet founded game publisher Lion Rampant in 1987 while attending Saint Olaf College; there they met Lisa Stevens who later joined the company.

His next game, the fifth in the World of Darkness, was Changeling: The Dreaming, designed with Sam Chupp, Ian Lemke and Joshua Gabriel Timbrook.

“The show wasn’t as good as it could have been, if they only had listened to me more.”[2] Kindred was cancelled after eight episodes, however, following the death of its star Mark Frankel any attempts to revive it were abandoned.

[6] Rein-Hagen continued to work in Hollywood for four years total, but disillusioned and fed up trying to make it as a writer, he decided to leave it behind.

Rein-Hagen was evacuated with other US citizens living in Georgia and founded the site sosgeorgia.org (now defunct) to help the international media track what was happening there.

On February 4, 2014 Rein-Hagen released a statement citing poor health as the reason for his lack of communication and promising that backers would get their game.

Commentators were extremely unhappy with the tone of the message and complained that Rein-Hagen's ill health had not affected his ability to work on other crowd-funded projects.

[14] Rein-Hagen elaborated on this role-playing game in March 2013, in another YouTube interview, describing some of the mechanics and speculating on a release date without naming it.