A free unofficial expansion pack for Command & Conquer: Red Alert 2 Yuri's Revenge, which retells, expands and continues the story of the original game. Enhanced with Ares DLL, Mental Omega strives to bring many new features to the game, including a 133-mission campaign, cooperative and a brand new faction: the Foehn Revolt.
pros:
awesome campaign
smashingly brilliant music
nice units, good balance
subfactions are so fun to play :)
cons:
difficulty not forgiving; can be a turn off for casual play :(
still has some bugs that need to be ironed out and dealt with