Overwatch features squad-based combat with two opposing teams of six players each. Players choose one of several hero characters, each with their own unique abilities and role classes. The four character roles include: offense characters with high speed and attack but low defense, defense characters meant to form choke points for enemies, support characters that provide buffs and debuffs for their allies and enemies respectively (such as healing or speed alterations), and tank characters that have a large amount of armor and hit points to withstand enemy attacks and draw fire away from teammates. Players can switch between characters in-game following deaths, which is encouraged by the game's overall design. The game's maps are inspired by real-world locations; the first three maps unveiled ("King's Row", "Hanamura", "Temple of Anubis") are inspired by London, Japan, and the ruins of Ancient Egypt, respectively.