The original.
Does not include utilities such as the (more up-to-date) NReality leaderboards, "Speedrun mode" level timing, etc.

N v1.4

N v1.4 Column 00 (by episode)

N v1.4 Column 00 (by level)

N v1.4 Column 10 (by episode)

N v1.4 Column 10 (by level)

N v1.4 Column 20 (by episode)

N v1.4 Column 20 (by level)

A fan-mod of N v1.4 including a full 100 extra episodes, speedrun and underclock modes (and highscores for both added modes), connection to NMaps for user levels, and more.
Highly recommended for all N v1.4 runners.

NReality v6g2

The latest and greatest. Fixes general lag issues for some players, but may result in other drawbacks, such as increased level load times.

NReality v7

Nightfirecat

Unreality

N: Way of the Ninja v1.4

Kyestatic

BurgerTime glitch

Yeti

Molentum

Muzgrob

XandoToaster

Arcree

ska234

Name	Manager
N v1.4 by Metanet Software	Nightfirecat 20 years ago
NReality v6g2 by Unreality	Nightfirecat 13 years ago
NReality v7 by Unreality	Nightfirecat 10 years ago

Name	Manager
N v1.4 Column 00 (by episode)	Nightfirecat never
N v1.4 Column 00 (by level)	Nightfirecat never
N v1.4 Column 10 (by episode)	Nightfirecat never
N v1.4 Column 10 (by level)	Nightfirecat never
N v1.4 Column 20 (by episode)	Nightfirecat never
N v1.4 Column 20 (by level)	Nightfirecat never