Mojang's canceled game was a first-person shooter.
Persson confirmed with Joystiq that the project was ended in the prototype stage because Mojang "did not want more external dependencies."
"The success of Minecraft meant we could focus on projects fully owned by us," Persson told Joystiq.
Mojang is still open to collaborating in the future so long as they are "not to make money," said Persson. "If there are other reasons to collaborate, maybe!"
Yesterday Persson told PC Gamer that he was hesitant to put Minecraft on Steam due to the service's monopoly on PC gaming.