Command & Conquer: Red Alert 3 continues the series' time-bending ways by once again exploring the importance of Albert Einstein in history. In previous games, Einstein was able to use time travel to remove Hitler, allowing the Russians to gain power and fight the U.S. in WWII.
Red Alert 3 finds the Soviets on the losing end of the war, prompting high command to use its own time machine to remove Einstein from the timeline. The stunt manages to save the Russian Empire, but also helps birth a new threat - the Empire of the Rising Sun - who pose an even greater, more technologically advanced threat to the Russian Empire and the world.
As with past games, the game's "What if?" nature allows for a variety of creative unit types. If there's an unusual research project or theory out there, Red Alert 3 finds some way to work it into the game. Tesla coils, man-cannons, armored bears... you name it. The addition of the Empire of the Rising Sun also allows the game to go the sci-fi route, complete with Gundam-like mechs, transforming jets and psychic schoolgirls.
Missions are straightforward and even though some objectives offer a slightly different goal, they all eventually involve destroying another faction's base. Gameplay is built with co-op play in mind; each mission features two commanders on the field with their own particular mission objectives. Playing with a friend is more entertaining than playing with an A.I. partner. Even with the favorable tip in balance, the game is just as challenging as each player has their own objectives to complete.
All three factions are playable from the start and offer their own particular stories that tie into the overall war story. Each faction's plot is complete enough that you'll get a reasonably satisfying story, though playing through all three in the suggested order is the only way to get all of the information.
The PS3 version's "Ultimate" billing comes from the addition of a few new multiplayer maps, some behind-the-scenes features and a set of video tutorials. Beyond these features, there's no significant difference between this and other versions of the same game.