The cut droid planet from Knights of the Old Republic II that modders later restored was M4-78.
M4-78 was designed as a droid-focused world intended to occupy a major place in the game’s plot. Its inhabitants were machines, and the planet’s story connected to the wider conflict involving the Jedi, the Sith, and the mysterious threat behind the game’s events.
Obsidian removed M4-78 during development because LucasArts imposed a demanding schedule and the team had only about 14 to 16 months to finish the sequel. Some of the planet’s assets were repurposed for other areas, including Nar Shaddaa’s yacht sequence, rather than being shipped in the retail game.
The M4-78 Enhancement Project reconstructed the cut location from surviving dialogue, design material, and unused game assets. It is a fan-made restoration, not content included in the original 2004 release, which is why players often encounter the planet only when using the restored-content mod.