In the future, mankind has mastered interplanetary travel. Mars was the first
target for pioneers; soon, settlements were built on the planet, and it became
Earth’s colony. A young girl named Esk was born on Mars, but her father took
her to the Earth when she was little. For some reason, she always longed to
see her home planet. Against the will of her father, Esk travels to Mars, but
on the way her spaceship is attacked. Upon arriving on Mars, Esk teams up with
a young adventurer named Cifer, and together they must find out who has
attacked the spaceship and why.

The fourth entry in _Des Blood_ series is, like its predecessors, a story-
driven shooter with adult content. The exploration mode is viewed from a
third-person perspective and involves the player navigating Esk through 3D
environments, finding the correct route and occasionally solving simple
puzzles. Most of the game’s locations are inhabited by enemies, which pop up
at pre-set points.

The player is then taken to a first-person shooting mode. The protagonist
cannot move during battles, and the player must aim and reload the gun
manually in order to take down the enemies before they kill Esk. It is
possible to purchase and find better ammunition, basic armor and health-
restoring items. Beside regular enemies, the player also has to deal with a
few bosses.

Sex scenes in the game are interactive, and occur infrequently, dictated by
plot events. Controlling different characters at certain points of the story,
the player has the possibility of interacting with 3D female character models.
In order to perform certain actions, the player can control the speed and the
direction of the corresponding movement with the mouse.