Theft
Even though theft is frowned upon, it happens quite a lot, especially in the quest for control of Terra-Xi. In Mech Wars you can only steal Katai Extractors. The KEs are special units and hence will be stolen by using one of the units utilizing a grappling hook and equipped with light-weight, high-speed, auto-piloting capsules.
There are currently two units available with both these features, namely the Looter and the Beholder. Send them with your squadron, and — if they survive — they will snap up as many KEs as possible. However, this is very hard work and finding and decoupling KEs from the soil is one of the most daunting and complicated things that you may do. Thus, the number of KEs that you are able to steal is not very high.