Des Blood 4: Lost Alone

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.