The Gungriffon games are focused on piloting mecha: large, usually bipedal military vehicles. This game series refers to these machines as Armored Walking Gun Systems (AWGS). With the exception of the High-MACS design, the mecha in this series have a distinctly realistic design philosophy, which is more apparent in the more recent installments. Source: Wikipedia, "GunGriffon: Allied Strike", available under the CC-BY-SA License.