Players can engage Halo 4 through a number of ways. In Campaign, players take the role of the Master Chief, the living legend of the Covenant War, a SPARTAN-II super-soldier wearing heavily modified GEN1 Mjolnir armor. Within War Games and Spartan Ops, players take the role of a highly specialized SPARTAN-IV super-soldier, deployed from UNSC Infinity and utilizing a state-of-the-art Mjolnir GEN2 armor system.
In both roles, players can leverage all of the expected abilities of a Spartan: power, speed, dexterity, and resilience far beyond that of a normal human. The player’s Mjolnir armor can also provide individualized specializations referred to as Armor Abilities, such as Hardlight Shield, Active Camouflage, or Jet Pack. SPARTAN-IVs can integrate additional armor modifications, such as Support Upgrades and Tactical Packages, which apply incremental yet valuable improvements to a Spartan’s combat functionality.