Gears of War is a third-person tactical shooter developed by Epic Games and published by Microsoft Game Studios. Originally released for the Xbox 360 in November 2006, it later arrived on Windows PC in November 2007. The game is set on the planet Sera, where humanity’s Coalition of Ordered Governments (COG) fights a desperate war against the subterranean Locust Horde. Players control Marcus Fenix, a disgraced former COG soldier, leading a small squad of heavily armored Gears through ruined cities and underground caverns. Gears of War is renowned for popularizing the “stop-and-pop” cover system, which forces players to move between cover points, blind-fire, and advance tactically rather than run-and-gun. The game also introduced an active reload mechanic that rewards timed button presses with faster reloads and damage boosts. The visuals, powered by Unreal Engine 3, were groundbreaking for their time, with highly detailed character models, rich environmental destruction, and a gritty, desaturated art style. Multiplayer includes cooperative campaign for two players and competitive modes over Xbox Live (on console) or Games for Windows LIVE (on PC). The PC version adds a new chapter, enhanced graphics options, and keyboard-and-mouse support, but also requires a GFWL account to save progress, a point of controversy among PC gamers.