The makers of the crowdfunded space game Star Citizen are being sued for copyright infringement and breach of contract by development studio Crytek.
Crytek claims Roberts Space Industries (RSI) and Cloud Imperium Games "have caused substantial harm" to them.
Crytek said it would seek damages and an injunction that stopped further use of its CryEngine game engine software.
Star Citizen's creators said the suit was "meritless" and added that it would defend itself "vigorously".
Development of Star Citizen began in 2012 and since then it has raised more than $170m (£126m) in crowdsourced funds from fans keen to play the ambitious space trading and combat game.
Star Citizen is the creation of gaming veteran Chris Roberts, who was behind the development of the iconic Wing Commander series of space games.
Original Source: http://www.bbc.co.uk/news/technology-42352606
