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Terra Invicta is a sci-fi grand strategy game developed by Pavonis Interactive, the team behind the Long War mods for XCOM, and published by Hooded Horse. It entered Early Access in September 2022 and received its full 1.0 release on Steam on January 5, 2026, for Windows PC.

An alien probe is detected heading toward Earth while an unknown force sets up in the Kuiper Belt. Nations fail to unite, so secret groups of political, military, and scientific leaders form to decide humanity's response. You lead one of seven factions, each with a different goal, from resisting the invasion to serving the aliens, negotiating surrender, profiting from chaos, or fleeing the Solar System.

On Earth, you recruit councilors who act as your agents. They gain influence over nations, run missions, and compete with rival factions for control of governments, armies, and space programs. Research unlocks new technology and slowly reveals the truth behind the alien arrival.

Later, the game moves into space. You build stations and bases on moons, asteroids, and planets, manage mining and supply, design ships, and fight fleet battles in a tactical combat mode with realistic orbital movement.

Terra Invicta is a single-player game with long, detailed campaigns. It suits players who enjoy deep grand strategy, slow-building sci-fi stories, and complex systems that reward planning over many hours.

Which version should you buy?

• PC: Keys activate on Steam. The game needs 64-bit Windows 10 and about 30 GB of storage.

• DLC: Add-ons such as Dark Skies and the Supporter Pack are sold separately and need the base game.

• Mods: Steam Workshop support lets you add community content to your campaign.

Before you buy, check the activation platform and region on each offer, then follow our guide on how to activate your CD key. For studio news, visit the official Pavonis Interactive website.