The game's storyline involves large numbers of fighters from around the world and across time coming together to battle for the title of World Champion in a series of 3-on-3 or 1-on-1 battles. During the events, two powerful fighters, Akuma and Rugal, fight each other, and one gains the power of the other, turning into either Shin Akuma or Ultimate Rugal, and battling the player's team or single character.
The game boasts a large lineup of characters from Capcom and SNK's fighting game franchises, mainly Street Fighter and The King of Fighters, and contains four console-exclusive bonus characters: Evil Ryu, Riot Iori, Shin Akuma (Shin Gouki in Japan), and Ultimate Rugal (God Rugal in Japan) powered-up versions of four regular characters. Shin Akuma and Ultimate Rugal are the boss fighters, and display tactics typical of bosses from SNK Playmore's fighting games.
Before selecting a team, the game offers a selection of "Grooves," which change the way the game is played, as well as "AC-ism" or "GC-ism" Grooves; GC-ism simplifies the control scheme, originally designed for the GameCube gamepad, which is not intuitively designed for fighting games.
The available grooves are:
- C-Groove: Play scheme based on the Street Fighter Alpha series: 3 Super Gauges, dash, level 2 Super canceling, counterattack, air block, tactical recovery and roll.
- A-Groove: "Custom Combo" play scheme from Street Fighter Alpha 2 and 3: 2 Super Gauges, dash, roll, counterattack, safe fall, and Custom Combo mode.
- P-Groove: Play scheme from Street Fighter III: Parries, dash, tactical recovery, and hop. New and exclusive to CvS2:EO was Super Canceling.
- S-Groove: Play scheme from The King of Fighters '94: Manually-chargeable Super Gauge, unlimited Supers at low life, run, dodge, counterattack, tactical recovery, and hop.
- N-Groove: "Advanced" play scheme from The King of Fighters '97: 3 Super Gauge "stocks", MAX mode, run, roll, hop, safe fall, counterattack, and counter movement.
- K-Groove: Play scheme amalgamated from Samurai Shodown and Garou: Mark of the Wolves: "Rage" gauge, Just Defense, run, safe fall, and hop.
Although the PS2 and Xbox versions received positive reviews, Edge reviewed the GameCube version of Capcom vs SNK 2 EO in issue 114, and, comparing this version to the original in the arcades and on the PlayStation 2, awarded the game only 3 out of 10. It was felt that the special move shortcuts diminished the impact of basic punches and kicks, destroying the game balance; no subtlety, nothing to learn, and no reward. The two player mode was especially criticized: "How can you celebrate some glorious special move victory when all it took was a single movement?".
|SNK vs. Capcom series|
|Capcom-produced||Capcom vs. SNK: Millennium Fight 2000 · Capcom vs. SNK 2: Mark of the Millennium 2001 (EO)|
|SNK-produced||SNK vs. Capcom: The Match of the Millennium · SNK vs. Capcom: Card Fighters Clash · SNK vs. Capcom: Card Fighters 2 Expand Edition · SNK vs. Capcom: SVC Chaos · SNK vs. Capcom: Card Fighters DS|