The base game has been free a couple of times before, this seems to also feature all the expansions.

ENDLESS Legend is the 4X turn-based fantasy strategy game by Amplitude Studios. Your homeworld, Auriga, is an inhospitable one. After surviving the worst winter on record for the fifth time in a row, alarming rumors about an even harsher future arrive to your ears.

As the leader of your people, it is your duty to protect and guide them...but you are not the only ones trying to survive and thrive on this planet.

Will you be remembered as the explorer who unveiled Auriga's secrets, the magnate who mastered the subtle arts of diplomacy and trade, or as the warmonger whose legacy was written in blood? The choice is yours.

ENDLESS Legend Definitive Edition, along with the base game, includes:

ENDLESS Legend - Guardians Who are these guardians? And more importantly, how will you make their powers yours?

ENDLESS Legend - Shadows The Forgotten are a major faction thought to be long gone. These masters of espionage, infiltration, and sabotage strike from the shadow.

ENDLESS Legend - Echoes of Auriga These seven new tracks are here to further enhance your immersion in the world of Auriga.

ENDLESS Legend - The Lost Tales The minor factions are brimming with characters whose stories remain to be told.

ENDLESS Legend - Shifters The Allayi faction's presence on Auriga predates the Endless. They are bound to Auriga, their bodies and minds reflecting the state of the planet, and they will do anything to defend it.

ENDLESS Legend - Tempest The oceans of Auriga still hold many mysteries: one of them now reveals itself in the form of the Morgawr faction.

ENDLESS Legend - Inferno This faction thrives on volcanic terrain, and they will not stop until the rivers of Auriga flow with lava.

ENDLESS Legend - Symbiosis The ancient faction of the Mykara joins the fray with one purpose in mind: bringing balance back to Auriga.

ENDLESS Legend - Monstrous Tales Dive in and uncover ancient truths with these twenty new quests.