There are a total of six different types of Nen in Hunter x Hunter and they are Enhancement, Transmutation, Emission, Conjuration, Manipulation, and Specialization. More complex Nen variants can be made by combining or deriving from the fundamental four principles of Nen. Every person in the HxH universe has one of these six types as their innate technique. Determining one's aura type is honestly simple and can be done through a process called water divination.
The art of Nen allows one to use their life force to create anything they can imagine, including superhuman abilities. In order to progress through the Nen mastery level, a person must master the four Nen principles - Ten, Zetsu, Ren, and Hatsu. Also, there are various Nen classifications, and each has its own advanced techniques.
A brand-new HxH game titled Hunter x Hunter: Nen x Impact has been announced by the popular publisher Bushiroad Games and up-and-coming game studio Eighting. It is confirmed to be a full-scale fighting game that you can play with your favorite HxH characters, but no tentative release date or platform information has been provided.