"You're going to haggle with me over the price of my hair? Really?"

Plains Giants are rust or dark brown Giants vaguely resembling Elves. Their long hair is light brown or blond and like the Desert Giants they often sell it to ropemakers, though theirs is considered to be of higher quality.

∑ +28 Strength, +4 Dex, +12 Constitution, +4 Wisdom, -4 Intelligence (minimum 3).
∑ Size Class: Huge size. -2 penalty to Armor Class, -2 penalty on attack rolls, -8 penalty on Hide checks, +8 bonus on grapple checks, lifting and carrying limits quadruple those of Medium characters. Space is 15', Reach is 15'.
∑ Giant, giving them Low Light Vision
∑ Base land speed 50 ft.
∑ Rock Throwing (Ex): The range increment is 140 feet for a Crag Giantís thrown rocks.
∑ +12 Natural Armor Bonus.
∑ Power Resistance: Plains Giants have Power Resistance equal to 12 plus CR.
∑ Racial Hit Dice: A Plains Giant begins with sixteen levels of Giant, which provide 16d8 Hit Dice, a base attack bonus of +12, and base saving throw bonuses of Fort +10, Ref +5, and Will +5. A Desert Giants Giant levels give it skill points equal to 19 ◊ (2 + Int modifier, minimum 1) and 6 Feats. Its class skills are Climb, Craft, Handle Animal, Intimidate, Listen, and Spot.
∑ Plains Giants have a Primary Slam attack doing 1d6 plus Strength Bonus. They get 2 Slam attacks with a Full Attack.
∑ Automatic Languages: Giant. Bonus Languages: Common.
∑ Level Adjustment: +7
∑ Favored Class: Barbarian

Adulthood: 110
Barbarian, Rogue, Sorcerer: +4d6
Bard, Fighter, Paladin, Ranger: +6d6
Cleric, Druid, Monk, Wizard: +10d6

Middle Age: 175
Old: 263
Venerable: 350
Maximum Age: +4d% years

Base Height: Male: 20 ft Female: 18 ft.
Height Modifier: +2d4 ft.
Base Weight: Male: 6000 lbs. Female: 4500 lbs.
Weight Modifier: x100 lbs.

Casters are a bad route as usual for most Giants. Just about anything else not relying on Int is good though.
Adventuring Race: Plains Giants go on adventures for curiosity, to escape the Sea of Silt, or hire out as mercenaries in desperate times.
Character Development: Mechanically the Plains Giants are pretty similar to the Desert Giants, and make decent antipsionic/caster fighters.
Character Names:

Much less xenophobic than the Desert Giant, you are also more industrious. Plains Giant hirelings are a fairly common site, and many of your people hire out to gain services for your Silt-locked brethren they might not have otherwise.
Personality: You like to be busy with something. Idleness is foreign to you.
Behaviors: Plains Giants spend much of their time refining their skills. The harsh life of the Silt makes it necessary.
Language: Plains Giants speak the Giant language, but have no written alphabet.

While they are still shepherds, the Plains Giants are not nearly as savage as the Desert Giants (and definitely not as bad as the Beastheads). The braver ones often travel the world if they can manage to escape the Silt.
Alignment : Plains Giant society is Chaotic Good for the most part, though some have Neutral tendencies.
Lands : Plains Giants live on islands in the Sea of Silt, preferring ones with plenty of vegetation.
Settlements : Plains Giants usually do not have the option to emigrate from their homes. The Sea of Silt makes mass migration impossible.
Beliefs : Plains Giants have few religious beliefs or preferences, as with most Athasians.
Relations: Unlike their relatives the Desert Giants, the Plains Giants get along relatively well with the other races, and many will temporarily hire out as workers.

∑ The traders who come to make rope from your tribe's hair are days late. You need the supplies they bring, which mean you need to venture out into the Silt to find what has gone wrong
∑ Silt Horrors have encircled the island, making you wonder if they are being driven by something. The tribe has a desperate plan to distract them long enough for you to get past them and bring help.
∑ A member of the tribe has gone missing. She has been seen at night in the distance in the Silt, but disappears before anyone can approach. You have been volunteered to solve this.