Deus Ex: Human Revolution is an action role-playing game. The gameplay combines first-person shooter, stealth, and role-playing elements. It features exploration and combat in environments connected to multiple city-based hubs, in addition to quests that grant experience and allow customization of the main character's abilities with items called Praxis Kits. Conversations between characters feature a variety of responses, with options in conversations and at crucial story points affecting how some events play out.