Yeah. I haven't bothered trying to add other games to Steam from outside of Steam, but between Blizzard, Origin, and Steam, Epic is just one more launcher among many, and Rebel Galaxy Outlaw isn't any different than adding, say, a GoG game or any other game that exists outside of a launcher (since, as I understand it, once the game's downloaded, one can run it free of the Epic launcher forever more afterward). As grouchy as I get about streaming services splintering more and more, that's because I have to pay for them. Something I don't have to pay for, beyond buying the game? Fine by me.I'm going to add it to my Steam library to keep things easy to manage on my end.