This mobile game is one of the most competent horror experiences on the go. It takes place between Dead Space 1 and 2 and we follow Vandal on a secret mission on the Sprawl, who is getting used as a puppet for the higher ups. Basically everything that made Dead Space great is in there, too. The touch controls need some time to getting used to but it's still crazy what the developers could do with such limited hardware. This game still works on Android... I unfortunately don't know if it's playable on iOS.
I doubt that this one gets a port although it didn't deserve to be forgotten.