I was stubling around neogaf and came across this gem of a forum thread “Limbo of the Lost stole from Oblivion, Morrowind, UT2K4, Diablo, Silent Hill, more?“. It looks like Limbo of the Lost borrowed (aka stole) art asset from a laundry list of games ranging for Unreal to Oblivion to Diablo. I have linked to two if the images and you make the call. Are they similar? Is that the same picture of a vampiric mayor in the back ground?
I would say it is common pratice to look at your sector of the video game industry for inspiration but this is down right theft (coincidentally one of the games they stole from is named Thief).