From the website:
This sourcebook helps you turn the 52 Weeks of Free Downloadable Border Wars Events into between 3 and 5 Years worth of adventures.
This supplement has the rules for playing as a Soldier in each of the New Factions. There are many new player created factions as well as ones created by the D.R. Team. Expanding the Lore of Refuge, Border Wars:Aftermath details the events of a chaotic year, 2217, when the Border Wars between the Northern Kingdoms of I'tash and the Earther Colonies finally ended.
Many new classes including the Balancer, and the EEF Exorcist. Many new player-created classes including The Bastard SpringRat, The Phantom & the Panzer Knight. New Vehicles including Capital Ships, Airships, Starships and WarGiants, including the unique city-class WarGiant- The Colossus of Beacon City. New Enemies including the stats for Unity Praetorians, Wintermute Blight Guard and the Fort Lendill Variable Starfighters.
Adds New Player-led Kingdoms to the Northern Kingdoms Campaign setting:
- The A'taru Asylum
- Beacon City
- Fort Lendill
- The Quantum Gate
- The Undead Kingdom of Wintermute
Adds new Player Created Factions:
- The Unity
- The Sons of Yantuk
- The Lions of Earth
- The Angels of Desolation
Adds Rules for New alien Speaking Races:
- The K'ias
- Warmonger's Dead
- The Quall N'fel