Revision as of 18:34, 17 February 2020 by Kennybot(Message Wall | contribs)(→top: Changed from US to worlwide accepted system, replaced: May 4, → 4 May)
OPUS: The Day We Found Earth had Steam trading card support added on 4 May 2016. There are 7 cards in the series, and you'll receive 4 cards at random for purchasing and playing the game.