One-Handed Action

One-handed action refers to actions that can be performed on the move while reloading, charging or firing weapons simultaneously; allowing the Tenno to perform a wide range of actions without being constrained with animation locks. For example, a  Nova can sprint and cast  Antimatter Drop while reloading a weapon at the same time, while a  Vauban can deploy  Bastille while charging a bow simultaneously.

Two-handed action refers to actions that lock the Tenno in an animation lock, disabling mobility and other one-handed actions. This means that even though  Mag's  Pull is a one handed action, it cannot be cast while rolling, as the latter is a two-handed action. Likewise while performing melee combos, an  Oberon cannot cast  Smite, as melee counts as a two-handed action.

List of One-Handed Actions

• Most Maneuvers: crouch, sprint, slide, jump, double jump, bullet jump, ledge grab, wall dash, wall latch, vault, and ziplining
• Using a one-handed ability
  • Being pulled with  Valkyr's  Rip Line
• Inserting a datamass into a Mobile Defense terminal
• Catching a glaive mid-flight

List of Two-Handed Actions

• Performing Melee attacks
• Rolling
• Interacting with objects:
  • Picking up a datamass
  • Opening a storage cabinet
  • Life support activation
  • Reviving other Tenno or Companions
  • Hacking consoles
• Using two-handed abilities