STAR WARS: EMPIRE AT WAR - STAR WARS: EMPIRE AT WAR is an Adventure, Strategy, Science-fiction, Real-time-strategy, Star Wars, Single and Multiplayer video game created by Petroglyph Games and published by LucasArts.
X-COM - X-COM is a Science-Fiction, Turn-base Tactics, Strategy and Single-player video game series developed by Mythos Games and published by MicroPose.
Star Trek Online - Star Trek Online (STO) is a free to play MMORPG that takes place inside the Star Trek world.
Xenonauts - Xenonauts attracts greatly on the sci-fi universe of the original X-COM to make a very familiar turn based tactical adventure.
X3: Terran Conflict - X3: Terran Conflict is part of the X number of video games.
Battle World: Kronos - Battle World: Kronos is a Turn-Based Real-Time Strategy (RTS) game along with a battle structured video game developed by KING Art.