Total Annihilation (TA) is a real-time strategy (RTS) video game created by Cavedog Entertainment under the guidance of lead designer Chris Taylor. It was released on September 30, 1997, and was the first RTS game to feature 3D units and terrain. Two expansion packs were released: The Core Contingency on April 30, 1998, and Battle Tactics exactly 2 months later on June 30, 1998. When TA was released, the minimum computer requirements were a Pentium 100 MHz processor and 16 MB of RAM. Of course, these requirements were for computers in 1997; modern day machines easily exceed those recommended specifications, but it is still recommended to have a 1 GHz processor and 512 MB of RAM for the updated game engine.