- Friendly Fandoms: With Mothership RPG. Both were developed roughly simultaneously and share some mechanical similarities. It's also easy to port statistics between the two games - some independent Mothership modules even include conversion guides to the Year Zero Engine.
http://tvtropes.org/pmwiki/pmwiki.php/YMMV/AlienTheRoleplayingGame
FollowingYMMV / Alien: The Roleplaying Game
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