MechWarrior 5: Mercenaries - Solaris Showdown adds arena-style combat content to the mercenary-company mech game, letting players test their BattleMechs in competitive showdowns inspired by the setting's famous fighting arenas. The base game's tactical combat and mech customization carry over.

Players can pit their mercenary company's mechs against new opponents in these arena battles, adding a different flavor of combat to the wider campaign experience.