Quite basic as games go, but DF was direct and straight to the point. Where many games have extravagant storylines that are designed to stretch the imagination, DF aims to utilise knowledge rather than imagination.
On DF, missions range from eliminating all enemy hostiles, to rescuing civilian hostages, to intercepting enemy convoys, and more.
The weapons options are quite limited, but when DF was released, it was quite a revolutionary game for its time.