NDI is a fictitious label used in the Uncharted series. NDI probably stands for Naughty Dog Incorporated and can be spotted on various objects, clothing and characters in the Uncharted games.
- Nathan Drake - On the back of Nate's gun holster is an imprinted "NDI" along with a decorative circle around it.
- Mk-NDI - The "NDI" in the name of the grenades is one of the more prominent uses of this easter egg.
- Parachute - If you look closely at Nathan's parachute from Uncharted: Drake's Fortune, the easter egg can be spotted
- London Restroom - In the one of The Pelicann's stalls, a sticker that says NDI can be seen.
- Storage Container - In Chapter 13 - Rough Seas, one of the storage containers has NDI on it. The same storage container also appears in the Graveyard multiplayer map.