According to the official website, adult video maker TMA has announced they discontinued the parody adult video of "Steins;Gate", titled "Layers;Gate" in response to the copyright infringement claim by game developer MAGES. TMA apologized to MAGES and other producers of Steins;Gate for making troubles and displeasures.

Cover image of Layers;Gate

TMA has been producing parody adult videos of anime for years such as "Faith/ero" (Fate/Zero), "CLONNAD" (CLANNAD), "Suzumiya Hahiru no Yuuutsu" (Suzumiya Haruhi no Yuuutsu), "K-ONBU!" (K-ON!) etc. Shikura Chiyomaru, the President of MAGES., tweeted last November that he was planning to take a legal action against TMA.

Sources: Shikura's tweet, Apology statement by TMA