67%Strong matchFallback
87%29487% positive reviews, Very Positive across 294 reviews·Action Roguelike · 2D Platformer
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Step into the shoes of Aetherion's newest agent and join them on their quest for infinite energy. Choose your playstyle and weapons, upgrade your equipment, and complete your missions to become stronger and survive on planet 347TH2-Terminus in this fast-paced roguelike-metroidvania.
FALLENSTAR
Steam
We are Aetherion Corporation, the world’s greatest chance, its salvation. Earth is running out of time: no more gas, no more fuel, nothing but wastelands and starving children left in complete darkness.
For years, we’ve been working on an infinite source of energy, project ‘Red Sun’, and now we’re closer than ever. And we need you.

Welcome to Aetherion, please, find your contract details below.

You are to explore the surface of planet 347TH2-Terminus and recover resources essential to completing Project ‘Red Sun’. Proceed with caution, the surface is perilous, and many agents have ventured there, never to return.
Should you succeed, a promotion will welcome you home. Should you fail, you will inspire thousands of future agents to carry on your legacy.

Article 1.2: All combat data will be collected and shared with future agents to increase their chances of survival. The more weapons you deploy, the more foes and unknown threats you encounter, the easier it will be for us to develop upgrades and new gadgets.

Every time you fire a shot, every time you use one of the gadgets we’ve provided, we will be watching. You’ll never be alone down there… We’ve got your back.

Article 2: You will be a proud member of the Crimson Gate, our best space ship. For the duration of your contract, you will be given a bed, a home, and a family. Every crew member stands ready to aid you in your mission, providing knowledge, weapons, gadgets, and any assistance you may require.
And if you do not return, each and every one of them is prepared to take your place and carry on your fight. Be it the engineer, be it the cook, be it every. single. one. until. the. last.

Article 3: Aetherion is the only thing you can trust out there. I will relay our orders, your tasks, your purpose, and the way you must live in order to maximize the mission’s chances of success, and, of course, your own chances of survival.
We… I will be your one and only truth. It is a pleasure to meet you, agent, I am Cora, the on-board AI of The Crimson Gate.
And remember:
“Together, we build a brighter tomorrow.”
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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The best games like FALLENSTAR are Fallback, A.R.E.S.: Extinction Agenda, AWAKEN - Astral Blade, Phoning Home, and Gestalt: Steam & Cinder.
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