Machines is a 3D real-time strategy game released for Microsoft Windows. Published by Acclaim and developed by Charybdis, Machines was one of the first 3D games of this genre. It was also one of the first to incorporate a first-person mode, in which players can personally control any Machine in their army from a first-person view.

Machines uses a 3D polygonal landscape, which players can use to their advantage, attacking from or hiding behind hilltops. The viewpoint can be switched between a default isometric, strategic 'zenith' camera, and first-person perspective; the latter typically being used to explore buildings during espionage missions.

50 different machines can be researched and built, including Commandants, Flying Machines, Spies, Knights, Armored Personnel Carriers, and Reapers. Battalions can be developed with specific strengths to support a personalized fighting strategy. The game also includes 25 different weapons, including Flame-throwers, Vortex Singularities, Plasma Rifles, Bolters, Ion Cannons and Nukes.

Sabotage and espionage missions allow units to deposit mines inside enemy buildings, steal research, and pass back vital information.

Machines supports multiplayer over a LAN or the internet.