'''One-Handed Action''' are actions that can be performed while [[reload]]ing or charging. They are called such because the animations to cast these abilities generally use up to one hand each, leaving the other hand free to reload weapons. This does not imply that all ability animations which show only one hand doing things are one-handed abilities; it only refers to the fact that a hand is still able to be reloading a weapon while the ability is being cast. The following actions include:
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.