Metroid is the first game in the Metroid series of video games. It was released first for the Famicom Disk System on August 6, 1986 (Japan), and later for the Nintendo Entertainment System in August 1987 (North America) and on January 15, 1988 (Europe).
Metroid provided one of the first highly nonlinear game experiences on a home console. The basic gameplay is a mix of action adventure and platform shooter. The player begins with a limited amount of power-ups and must search for more in order to reach the next, previously unreachable area. The game world is divided up into five different locations, all containing various enemies and environmental hazards that impede the player's progress. Two of the areas have bosses who must be defeated in order to reach the final area and the final boss. Metroid has five different endings that vary depending on how much time the player takes to finish the game. The two fastest endings feature Samus Aran in various stages of undress, revealing that the main character is actually a woman.