Skullgirls has been out on Steam for nearly two years now, and will probably be putting the extra content in the PS4 release out as DLC for that.
We didn't release on there initially because the dev team (Reverge Labs) didn't have the manpower to launch on three platforms at once, and there was some concern that there wasn't an audience for fighters at the time. The plan was to start on the Steam version as soon as the console releases were out, but Autumn ran out of money because of their legal battle with Konami over Def Jam Rap Star, and we were all laid off instead.
When I reformed the team as Lab Zero, Autumn had found a publishing partner to fund the development of the Steam port, Marvelous. So we contracted that out while we internally finished the first character funded by our Indiegogo campaign.
Thankx for your response. Sounds like you had a hard time when Autumn ran out of money. I'm glad you were able to reform the team!
Were the sales on Steam lower/as good/higher than on XBLA? (let's ignore ps3 here because the game was free with ps+)