Armored Core 3 Portable is a single-player and multiplayer action game in which players pilot customizable battle machines called mechs to complete various combat and reconnaissance missions. In this game, players assume the role of a Raven mercenary operating in a futuristic setting where mechanized warfare dominates the battlefield, undertaking tasks that range from combat to sabotage. It stands out with its extensive customization options, including weapon upgrades, shields, and the addition of Exceed Orbit units, as well as its support for ad-hoc wireless multiplayer battles, allowing up to four players to compete in deathmatches.