Rage

While Obsidian has not confirmed the existence of rage (or the features that improve it) in NWN2, it is a class feature of the barbarian class which have been confirmed.

3.5 Rage
A character with this feature can fly into a screaming rage.

In a rage, a character temporarily gains a +4 bonus to strength, a +4 bonus to constitution, and a +2 morale bonus on will saves, but he takes a –2 penalty to armor class. The increase in constitution increases the character’s hit points by 2 points per level, but these hit points go away at the end of the rage when his constitution score drops back to normal. (These extra hit points are not lost first the way temporary hit points are.)

Restrictions
While raging, a character cannot use any charisma-, dexterity-, or intelligence-based skills (except for balance, escape artist, intimidate, and ride), the concentration skill, or any abilities that require patience or concentration, nor can he cast spells or activate magic items that require a command word, a spell trigger (such as a wand), or spell completion (such as a scroll) to function. He can use any feat he has except combat expertise, item creation feats, and metamagic feats.

A character can fly into a rage only once per encounter.

Duration
A fit of rage lasts for a number of rounds equal to 3 + the character’s (newly improved) constitution modifier. A character may prematurely end his rage. At the end of the rage, the character loses the rage modifiers and restrictions and becomes fatigued (–2 penalty to Strength, –2 penalty to Dexterity, can’t charge or run) for the duration of the current encounter (unless he has Tireless rage).

Greater rage
A character’s bonuses to strength and constitution during his rage each increase to +6, and his morale bonus on will saves increases to +3. The penalty to AC remains at –2.

Indomitable rage
A character gains a +4 bonus on will saves to resist enchantment spells. This bonus stacks with all other modifiers, including the morale bonus on will saves he also receives during his rage.

Tireless rage
A character no longer becomes fatigued at the end of his rage.

Mighty rage
A character's bonuses to strength and constitution during his rage each increase to +8, and his morale bonus on will saves increases to +4. The penalty to AC remains at –2.

NWN comparison

 * Attempting to rage in NWN could be disrupted in the same way as spellcasting.
 * Raging had no effect on other actions a barbarian could use (e.g. it did not prevent item usage).