Buildbox viewport is 1136 x 640. I'm not sure what standard resolution size is for Steam Games, but I'd assume it's larger than this. Killing Floor seems to be 1336x768 from what I've found. Is Buildbox scaling the game up to work with Steam? I see the BB game Parallels is on Steam. Looks pretty damn good. I'll play it soon. Other Steam Threads on BB: https://www.buildbox.com/forum/inde...-the-game-in-steam-but-there-are-issues.1786/ https://www.buildbox.com/forum/index.php?threads/has-anyone-published-game-on-steam.785/#post-4618 https://www.buildbox.com/forum/index.php?threads/steam-greenlight-parallels-the-experiment.59/