He is best known as the designer of the Dragon Age RPG, Warhammer Fantasy Roleplay (second edition), and Freeport: The City of Adventure.

[1]: 371  Pramas asked Steve Kenson to design a new d20-based superhero role-playing game for Green Ronin, which resulted in Mutants & Masterminds (2002).

[1]: 51  Pramas wrote the sourcebook The Pirate's Guide to Freeport (2007) for Green Ronin, with Patrick O'Duffy and Robert J.

[1]: 375  While continuing to lead Green Ronin Publishing, Pramas is a content designer for the Pirates of the Burning Sea massively multi-player online game at Flying Lab Software.

[citation needed] In 2012, he appeared on two episodes of the web series TableTop running his Dragon Age roleplaying game for host Wil Wheaton and the show's guests.