1) Darth Vader locale 2) Multidirectional shooter 3) Planet pulverizer of sci-fi 4) Sci-fi battle site 5) Video game clone 
[video game] Deathstar (Also written as DeathStar) is an 8-bit computer game for the Acorn Electron and BBC Micro developed by Peter Johnson and originally published in the UK by Superior Software in 1985. It is a clone of the arcade game Sinistar. The player uses four keys, two to rotate the ship (which is always moving forwards), one for ...
A unit with incredible power, often far above that of a typical unit.
The original Deathstar was the penultimate glass cannon, a giant planet-destroying laser mounted on a space station that was surprisingly easy to kill with a single Proton Torpedo. A Deathstar in 40k ironically is the reverse of the Star Wars Definition, a unit that has had extreme amounts of points invested into making it nearly-indestructible, wh...