Weapon and Armor Proficiency: Goliath liberators gain proficiency with martial weapons and with light and medium armor.

Favored Enemy (Giant) (Ex): A goliath liberator has giants as a favored enemy. Due to her extensive study of giants and training in the proper techniques for combating such creatures, the liberator gains a +2 bonus on Bluff, Listen, Sense Motive, Spot, and Survival checks when using these skills against giants. Likewise, she gets a +2 bonus on weapon damage rolls against such creatures. These bonuses stack with those gained from the favored enemy (giants) class feature of other classes (such as ranger), but this ability does not increase those classes' other favored enemy bonuses. For instance, if a 5th-level ranger/1st-level goliath liberator has already selected giants as one of her ranger favored enemies, this +2 bonus would stack with the favored enemy (giants) bonus she already had. It would not increase the character's favored enemy bonuses against other types of creatures. This bonus increases to +4 when the liberator reaches 5th level.

Avoid Thrown Weapons (Ex): A goliath liberator of 2nd level or higher is adept at dodging rocks thrown by giants, and by extension has learned to avoid other thrown weapons. She has a +2 dodge bonus to her AC against thrown weapons.

Equal Footing (Ex): The bigger they are, the harder a goliath liberator can make them fall. At 3rd level, a goliath liberator gains Improved Trip as a bonus feat, even if she does not meet the prerequisites. In addition, when making a trip attack against a creature at least one size category larger than she is, the goliath liberator gains an additional +4 bonus on her Strength check made to trip the opponent.

Avoid Reach (Ex): At 4th level and higher, a goliath liberator knows how to duck under and around the blows of even the longest-limbed giant. This ability grants the liberator a +2 dodge bonus to AC against melee attacks made by creatures that are not adjacent to her.

Adaptation

While this prestige class is specific to goliaths, it can be converted into a different giant-fighting class with little difficulty. If you do so, balance giant-specific class features (such as favored enemy) with class features that are useful against giants but more broadly applicable (such as avoid thrown weapons).