The listing, Subject 13 [Steam Key] has ended.
Subject 13 is the new adventure game developed by Paul Cuisset—the man behind "Flashback", "Future Wars: Adventures in Time" and "Moto Racer"—in partnership with Microïds.
This is a true adventure game. It depicts a mysterious universe filled with secret hiding places and all kinds of mechanisms that the player discovers, analyzes, and activates. There are also objects to collect and to figure out how to use in the backdrops…
Subject 13 will make you travel from a secret base that has been abandoned to a strange and mysterious island, so you can discover the real story. You'll have to muster all your insight and intelligence for this daunting challenge.
More info: http://store.steampowered.com/app/322970/
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This game works on mac too! Also includes steam trading cards
Good Luck!