The Tempest

A downloadable expansion for Warhammer 40k Only War. This is primarily a player-centric book, with new options for all kinds of things.

Five new base specialties for Guardsmen and Support choices.
Nineteen new advanced specialties for everyone.
Five new Homeworld choices.
Two new Commanding Officer.
Seven new Regiment types (and one re-worked one!)
Twelve new Training and Equipment Doctrines.
Eleven new Drawbacks.
And like, so many Weapons, Armour, and Wargear.

For other more GM sided goodies, there's a new Righteous Fury table just for that special someone using a flamer, reworked Requisition Rules to use a points system, a absolutely huge system for trying to create "balanced" weapons and gear, and our own bundle of house rules.