Nightfall

Nightfall is a roguelike where you play the co-pilot of a tiny spaceship that has mysteriously crushed into an asteroid. When you go out to the surface, your character discovers that the asteroid is inhabited by an unknown and dangerous life form.

Besides this murderous alien life form, you also have to take into account the asteroid's movement. Each second that passes, it moves away from the sun, so darkness begins to fall quickly from the left of the screen. If it reaches you, you'll be dead in seconds.

The action in Nightfall is turn-based. Both the movement of your character as well as the battles are solved following a simple system. And as usual, you can use all kinds of weapons and objects, including first aid kits, which are super necessary to maintain your health.

Nightfall is an RPG with conventional gameplay but a really original storyline and setting. The closest reference to it, in fact, would probably be Pitch Black, an excellent science fiction movie.