The STN T-12 Viper is a plane in Just Cause Unity.
The Viper is a fifth-generation multi-role fighter jet designed by STN in 2013 as part of the Air Superiority Program, which was STN's first attempt at a multi-role fighter. Millions of dollars were poured into the project, resulting in the STN T-12 Viper. Unfortunately, the project flopped and was only bought by the military forces of smaller countries as well as the Moroccan Military.
- It is produced by the STN company.