Longtime SL builder Ifrit Skytower has a controversial but important post alleging that many buildings in Second Life's renowned Insilico sim -- back in SL after the fraught departure of Skills Hak, the original owner-- are rips of 3D models from well-known games. Skytower's post has a host of comparison images, such as this one here, of a portal in Insilico that looks suspiciously like one from XCOM: Enemy Unknown. (One of my favorite games of all time, goddammit.)
I've twice contacted the person alleged to have made these rips, and will post their reply if I receive any. (And in the meantime, any mention of the person's name in Comments will be auto-deleted.) In any case, emphasis on "alleged", because many of the models may not be direct rips, but inspirational reference points.
Speaking more broadly, mesh rips are fairly common in Second Life, so specific instances are generally not worth reporting. In this case, however, Insilico is one of Second Life's most well-known and admired sims, often featured in Linden Lab marketing materials of SL (including business cards.) Perhaps even more relevant, the allegations illustrate a challenge that's existed since Second Life enabled mesh-based objects. As Skytower notes: