A science fiction infantry tabletop miniatures wargame retaining as many 'realistic' features as possible, while striving to minimize complexity.
The game, intended for use with 25/28mm miniatures (of whichever manufacturers the players prefer), features morale and fog-of-war/limited intelligence rules which have a significant impact on the battles - at least as much as actually killing the opposing forces. Troop types from lightly armoured basic infantry (say, Aliens Colonial Marines level) up to heavy power-armoured juggernauts (for example Starship Trooper Mobile Infantry or WH40K Terminators), as well as robots, cyborgs, remotes etc (thus allowing armies from the Terminator films, Cybermen, etc).
Vehicles are intentionally not featured within the rules, leaving it as a game with the focus on infantry (from high tech to very high tech) and their main support weapons.
Rather than treating tabletop battles as simply "line up 1000 points per side and fight until one side is gone" affairs, Killing Machine takes a more intelligent, mature look at this kind of skirmish gaming with its morale and intelligence rules.