Sentry Drone ★★★
Sentry Drone ★★★ is an uncommon electric throwable item.
This defensive drone activates its battle functions when under direct threat.
Its rapid plasmic generator starts to rotate, accelerating, spewing small plasma balls at its target from a relatively long distance.
Ingame
Species descriptions:
- Alta: A security drone taken to the max. Anyone would feel safe protected by such a thing.
Radiomessages on pickup:
- Seems like you’ve acquired an Alta Robotic, or simply a Drone Spawner. You can activate it to deploy a friendly drone (or droid). Unfortunately, you won’t be able to further control it or deactivate it back.
Parameters
Sentry
Will perform a long semi-auto attack consisting of 30 accelerated Plasma Balls. Will explode with electric particles on destruction.
Extreme vigilance is primary to this mechanism’s objectives.
Shielded Drone
Has status effects: 
Sensitive Electronics, 
Force Field Autoshielder.
Deals physical damage on touch.
While energy shields are common among alta technology, these ones in particular are extra good.
Sources
Can be bought from merchants:
Can be obtained via 
Spawnable Item Pack or 