Some of the levels in Metroid: Zero Mission are loosely based on the original game, but all-new maps and challenges will quickly prove to any Metroid fan that this a whole new experience. Samus begins the game with very limited abilities, but as the game progresses she gradually becomes more powerful. Each time a new upgrade is found, Samus can use it to gain access to new areas and power-ups such as missile and energy tanks. Thorough exploration and backtracking is the key to success in this game.
Metroid: Zero Mission delivers a huge, action-packed adventure. The environments Samus finds on Planet Zebes are massive, and there are plenty of equally large hidden areas waiting to be discovered. It's hard enough to simply complete Samus's mission, and only the best bounty hunters will be able to finish the game while finding 100% of the secrets and items.