Copyright infringement

Star Citizen game makers being sued

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.