N++

N++ is the third main game in the fast-paced, momentum-based N platformer series and the sequel to N+. As in all of the games the player controls a ninja who combines a variety of running and jumping mechanics to get around. There is regular running where speed is built up until a maximum is reached, two types of jumping based on tapping or holding, angled jumping, walljumping, and wallsliding. When landing from great heights an angled surface needs to be used, otherwise the character is dead right away.

The game consists of three main game modes: Solo, Co-op and Race. All levels take place in minimalist single-screen environments. Up to 60 colour palettes can be unlocked to alter the game's look. Solo consists of a large amount of episodes divided over three categories: Intro (25 tutorial episodes), N++ (100 entirely new episodes) and Legacy (100 episodes from previous games). The game is said to have 2,360 unique levels in total. Each episode consists of five levels that need to be completed in one session, but with an unlimited amount of lives. Each level is completed by locating the exit, which usually requires activating a switch first. There are 90 seconds to complete each episode of five levels and optionally a level can be perfected by collecting all gold. Each gold pick-up also provides two additional seconds. Along the way obstacles and robot enemies need to be avoided.

Co-op is similar, but these levels for up to four players can only be completed by working together and sometimes doing sacrifices. In the Race mode, which can also be played competitively with up to four players, each level is started with a bonus. Collecting gold increases the bonus and when the exit is reached the bonus is converted into a permanent score. In multiplayer these levels are played by all players simultaneously. Players who do not reach the exit receive nothing, and whenever a player reaches the exit, a rocket is launched that can be controlled by that players to take out one of the other ninjas. When a player reaches the exit Sudden Death is also activated and respawns are no longer possible, along with a quicker decrease of the bonus and death when there is none left. If it takes too long for players to reach the exit, the You Suck mode is activated and enemies are gradually removed from the level. When a player then reaches the exit, all other player characters explode right away.

The game comes with a level editor to create and share custom levels. Levels have global leaderboards, also for custom levels.