If we are to believe Rock, Paper, Shotgun's Lewie Procter, Ms. Splosion Man suddenly turned up in on his Steam account. Which is kinda odd, considering that as far as everyone knew, that game was exclusive for the Xbox 360. It has now been replaced by a "ValveTestApp105420", which doesn't sound half as fun as a game from Twisted Pixel, but it might tickle your fancy I suppose. And I guess we can all expect Ms. Splosion Man to be announced for the PC sooner or later.