Buy Ad Astra: Sci-Fi Tower Defense PC key

Ad Astra: Sci-Fi Tower Defense is a tower defense game set in a distant future where humanity searches alien worlds for resources to fuel its expansion. There, humanity encounters a galaxy-spanning machine race powered by a sentient artificial intelligence. You defend vital outposts and establish footholds on resource-rich worlds in a war for control across the stars.

Build and defend

You construct resource-gathering structures while balancing them against defenses for the incoming machine hordes. Gather advanced metals, gases and composites to build and upgrade towers through Tiers 1–3. Towers use cannons, lasers and missiles, but their fire can also damage your own infrastructure, so you need to consider lines of sight and placement.

Face the machine hordes

The enemy includes machine species with different strengths and weaknesses, from armored mecha-beasts and swift infiltrators to shielded behemoths and swarms of biomechanical monstrosities. You adapt your defenses to counter them as their attacks grow stronger.

Game modes

Ad Astra offers three modes: Quick, Standard and Infinite. You manage your base and defenses against increasingly powerful enemies, and can pursue your best high score across the levels.

Alien worlds

The game has 3 biomes and 9 levels. Their terrain ranges from rocky hills and icy alien moons to scorching deserts, with different building areas and challenges. The terrain starts with more room to build and becomes more limited.

Music and achievements

The soundtrack features retro arcade sci-fi music by Ovani Sound. A Music Player lets you find tracks, and independent sound sliders let you adjust the audio. Achievements mark progress through the game's challenges.