Currently, the Accredited Employer Work Visa pathway is the main visa stream for work visas in New Zealand.
This visa allows you to come to New Zealand and undertake work that contributes to the current labour supply in New Zealand.
Accredited Employer Work Visas are employer-assisted work visas, meaning that if granted, one of the conditions of the visa is that you are only able to work in a specific role for one particular employer.
Less common work visa categorys offered by Immigration New Zealand include:
Key points:

Accredited Employer Work Visas are the main employer-assisted work visas offered by Immigration New Zealand. They allow you to work for a single employer in a specific role.
Partnership-based work visas allow a couple to remain together in New Zealand begin working towards their life together. This visa application is made on the basis of the partnership with a New Zealand Citizen, Resident or Work Visa holder
This is the logical next step for many international students after the successful completion of their studies here in New Zealand.
An onshore-based work visa option allowing you to work for a maximum period of 6 months for any current Accredited Supplementary Seasonal Employer (SSE)