Kill-Mech

According to some variations of sources, Kill-Mechs were present on the planet Dispater in the 26th century, when they attempted an invasion. This was, evidently, at the exact same time as a Dalek invasion of the same planet. (COMIC: Star Tigers)

Anatomy
The inner-mechanisms of the Kill-Mech are not known, but the species appeared to be android or cyborg in nature. Their bodies featured circular heads, armless torsos, and a three-pronged base. The Kill-Mech would blast bolts of energy out of their chest plates.

The Kill-Mech were somewhat similar to Daleks, well known for exclaiming "eradicate" on the battlefield. (COMIC: Star Tigers)

Behind the scenes
The Daleks were originally to have featured in part six of Star Tigers, when they would have been seen closing in on Dispater. However, the instalment had to be rewritten and revised to replace the Daleks with the Kill-Mechs, totally original creations, when it was rumoured that Terry Nation was planning to withdraw the licence to use the Daleks in the strip. Fortunately, it turned out Nation had no such intentions and the Daleks returned in part seven. The Abslom Daak: Dalek Killer graphic novel restores the original dialogue and art, removing the Kill-Mechs altogether.