Koei has announced it has shipped a combined 1.5 million units worldwide of Warriors Orochi across all game platforms - PSP, PS2, Xbox 360 and PC.

Warriors Orochi is a crossover of Koei's hugely popular Dynasty Warriors and Samurai Warriors franchises.

"This milestone is a significant testament to the global impact not only of this game, but also to the tremendous admiration that fans worldwide share for the Dynasty Warriors and Samurai Warriors characters," said Amos Ip, Senior Vice President at KOEI Corporation. "As we celebrate, I would like to recognize and express our thanks to the video game world's greatest fans for making this achievement possible."

A sequel, Warriors Orochi 2 is scheduled for release across Europe this September for Xbox 360 and PS2.