• WIN 98/ME/2000/XP
• Pentium III or AMD Athlon 733MHz processor  (*Pentium or AMD 1.0 GHz or greater RECOMMENDED)
• 128 MB RAM (256 MB RAM or greater RECOMMENDED)
• 3 GB Harddisk space
• 8X CD Rom
• Windows compatible sound card (*Sound Blaster Audigy series sound card RECOMMENDED) (NVIDIA nForce or other motherboards / soundcards containing the Dolby Digital Interactive Content Encoder required for Dolby Digital audio. Also RECOMMENDED)
• 3D Accelerator card with 16 MB VRAM (*32-128 MB VRAM RECOMMENDED) 16 MB TNT2-class DirectX version 6 compliant video card. (*NVIDIA GeForce 2/ATI Radeon RECOMMENDED) DirectX version 8.1 (Included on game disc)
• 3D Accelerator card with 16 MB VRAM (*32-128 MB VRAM RECOMMENDED) 16 MB TNT2-class DirectX version 6 compliant video card. (*NVIDIA GeForce 2/ATI Radeon RECOMMENDED) DirectX version 8.1 (Included on game disc)
• Internet (TCP/IP) and LAN (TCP/IP) play supported. *Internet play requires a 33.6 Kbps or faster modem

Unreal II is the sequel to the original Unreal and takes place in the same fictional universe - but the main player character and the locations are different than those found in the first game.

As the player, you are the lone representative of the Law in a distant sector of space. You patrol your beat in the creaky but serviceable starship Atlantis, a former military escort vessel that was decommissioned and retrofitted for civil government service long ago. You are accompanied by a support crew of three: Ne'Ban is your trusty alien pilot, Isaak is an engineer who keeps the ship running, and Aida acts as your Intelligence officer - she monitors the situation in the sector, keeps you up to date, and briefs you before you leave the Atlantis to go on a planetary mission.

Things are quiet... until the sector erupts in a full-scale interstellar war. Battles rage on and around more than ten vastly different worlds as several alien races, multiple mercenary armies, and the infamous Terran Military engage in fierce combat. You are caught in the middle of the fighting, and must balance your responsibility to protect the colonists, archaeologists, miners, and other civilians in your sector... with the duty to discover the source of the conflict and put an end to the war.

Unreal II takes the form of a series of missions linked by the narrative framework of the game's story. Missions may take place in the dense jungle of a tropical planet, in the ancient ruins of an alien city, deep underground in a warren of tunnels, on the molten surface of a hellish volcanic world, in the bowels of an alien industrial facility, in the endless oceans of a water-bound world, or on board an enemy starship. There are more than ten unique settings, each with its own distinct look and production design.

The story unfolds through briefings, cut scenes, in-game dialog, and the action contained in the missions themselves. Story telling does not get in the way of the action - the game is designed so that the missions are fast paced and intense; there are natural pauses as the player returns to the Atlantis between combat missions.