Project Unreality was a video game console emulator for the Nintendo 64.

[2][3] Development on Project Unreality started in late 1997, just over a year after the launch of the Nintendo 64.

[8] In May 1998, lead programmer Michael Tedder announced that Project Unreality would be "put on the back burner for now", though no future updates were ever released.

[9] This news coincided with Tedder's hiring to Z-Axis, where he continued to work until early 2000.

[10][11] Though Tedder repeatedly claimed that Nintendo hadn't contacted him regarding Project Unreality,[4][6] the rumor that Nintendo halted the emulator's development spread throughout the emulation scene; it has been suggested that UltraHLE's development was carried out in secret directly as a result of this rumor.