
The game was first revealed in a teaser by Bandai Namco on the official website until it was revealed in the April 2012 issue of Famitsu. Namco Bandai came up with the idea of a "dream crossover" and brought on Capcom and Sega. Remaissance La Vaes from Shining Force EXA.Ciseaux from Sakura Wars ( Sakura Taisen).Aya-me from Sakura Wars ( Sakura Taisen).Selvaria Bles from Valkyria Chronicles ( Senjō no Valkyria).Nemesis from Resident Evil ( Biohazard).Omicon from Super Robot Taisen OG Saga: Endless Frontier.Necron from Super Robot Taisen OG Saga: Endless Frontier.Phantom from Super Robot Taisen OG Saga: Endless Frontier.Zephyr and Leanne from Resonance of Fate ( End of Eternity).Toma and Cyrille from Shining Force EXA.Akira Yuki and Pai Chan from Virtua Fighter.Gemini Sunrise and Erica Fontaine from Sakura Wars ( Sakura Taisen).Ichirō Ōgami and Sakura Shingūji from Sakura Wars ( Sakura Taisen).Kurt Irving and Riela Marceris from Valkyria Chronicles III ( Senjō no Valkyria 3: Unrecorded Chronicles).Frank West from Dead Rising and Hsien-Ko from Darkstalkers.



Additional gameplay elements include Support Attack, which allows the player to call in a nearby ally for assistance, and Cross Hit, which freezes the target in place during simultaneous attacks from multiple units. The battle system is called the Cross Active Battle System, wherein pressing the A button in combination with the Circle Pad performs up to five basic attack combos. Unlike Namco × Capcom, units can move freely within their range on the field map, with no penalty for accessing treasure chests or destructible objects prior to attacking. Each friendly unit is made up of two characters (thus referred to as a Pair Unit), though a third character (or "Solo Unit") can be added for once-per-battle assistance. Stages in Project X Zone take place in grid-based locations from the game's many crossover titles.
