ASSERT

The ASSERT, also known as ACS, are an antagonistic NPC faction in several ZMP series, such as Assertive Acquisitions, and before that Survival Impossible and Wrong Way Down. 
This faction only attacks players when provoked, buying the players time to prepare. They carry thrusters that are better than vanilla thrusters and that players can only loot but not craft. 
Many of the ship blueprints and radio voices were donated by ZMP community members and edited by Splitsie. 
The ASSERT behaviour is controlled by the Assertive Combat Systems (ACS) mod.