For the last few years, NixonVisons X-Assault has been one of the most popular fan-created X-Men related games available online. At least it was, until a few days ago when the following announcement was made at the NixonVision website:
X-Assault: The End? Yes, True Believers, the rumors are true. Marvel Comics has informed us that if we release X-Assault v0.96 (or any other X-Assault, for that matter), they will bring legal action against us for thousands of dollars. Which we don't have.