Command & Conquer: Red Alert 2 is a seminal Real Time Strategy (RTS) game released in 2000. The core gameplay involves base building, resource management, and tactical unit deployment in a conflict stemming from time travel altering history, pitting the Allies against the invading Soviet Union. Distinctive features include unique, often sci-fi inspired units like Prism Tanks and Psychic Mind Control Squids, supporting full solo campaigns and eight multiplayer modes across nine nations. The game also includes one official expansion.
The primary gameplay loop centers on base construction, resource gathering, and tactical unit management typical of the RTS genre. Players must establish operational bases, harvest resources to fund their war machine, and then design and deploy diverse military forces to overwhelm the opposition. The strategic depth comes from mastering the unique capabilities of each faction's arsenal.
The narrative premise revolves around the consequences of time travel, where the resulting power vacuum allows Stalin's Soviet Union to launch a full-scale invasion of Europe and North America. Players engage in a full solo campaign experience, fighting either for freedom or behind the Iron Curtain, depending on their allegiance.
A significant appeal of this game lies in its imaginative and often unconventional military hardware. Factions command distinct unit rosters that heavily influence strategic deployment. For example, the Allied forces utilize specialized weaponry such as Prism Tanks, capable of focusing energy beams, while the Soviets field units like Tesla Troopers, harnessing electrical power. The arsenal extends into the bizarre and powerful, including units such as Psychic Mind Control Giant Squids and Sonic Dolphins, adding layers of unexpected tactical depth to engagements.
Beyond the main story campaigns, the game offers extensive replayability through its multiplayer modes. Players can engage in skirmishes across eight different modes, representing nine distinct nations available for selection. This allows for varied competitive and asymmetrical experiences against human opponents.
This core game features one official expansion pack, which introduces further content and gameplay elements to the established framework. There are no official DLCs associated with the base game release.
The content of this game is suitable for persons aged 12 years and over only. It contains: Realistic looking violence

Mental Omega is a free unofficial expansion pack for Command & Conquer Red Alert 2 Yuri's Revenge. It started off as a balance modification and after a few years, it had grown into an unofficial sequel with new campaigns for the Allies, Soviets and Yuri. Now, version 3.3 marks the end of the long road and is the final iteration of the Mental Omega mod series.

The game begins with a presidential briefing in the White House concerning Yuri and how he has begun his take over of the world through mind control. Yuri interrupts the briefing to explain how he plans to take over the world, telling the American President Michael Dugan that he has a network of Psychic Dominators around the world, which he is now beginning to reveal. One of Yuri's Psychic Dominators is on Alcatraz Island in San Francisco, which Yuri activates just before ending his transmission to the White House. The President immediately calls in an airstrike on the device, but all the attacking aircraft were shot down, although one crashes into the nuclear reactor on the island, causing the device to lose power and to not function. Despite this, Yuri activates his other Psychic Dominators around the world and the majority of the planet quickly succumbs to Yuri's mind-control.