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Gameplay Trailer
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Rule the battlefield from orbit! Crystal Nexus: Alien Siege is a hybrid deckbuilding tower-defense game that puts you in charge of outposts on hostile alien planets. Look down on the battlefield from your space station and deploy towers, weapons, and buffs from the cards you’ve collected!

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About Crystal Nexus: Alien Siege

Crystal Nexus: Alien Siege video 1

Employee of Mild Value: congratulations on your Rehydration and reintegration into the bright and lively world of unsuspended animation! Please ignore any lingering visions of what might appear to be your forcible abduction and storage; these are hallucinatory delusions; they will pass with time. You have much more important things to focus on. After all… 

Today is the big day! That’s right! As you will no doubt deduce from the Deckbuilding, Tower Defense, and Orbital Death Machine training-manuals loaded onto your workstation down the hall, today you will officially start your new position as a Crystal Nexus Remote Drone Operator! How exciting for you!

Remember to review your new job responsibilities with care, as well as the Performance-Based Resource Allocation Table in the company handbook. 

Good luck! Workers are replaceable but Profits are forever!

FEATURES

Unique hybrid gameplay between tower-defense and deckbuilding. Victory is half the tools you bring, and half knowing how to use them!
Shifting terrain and enemies means that every encounter presents a distinctive tactical challenge!
The company is always looking to save money! Budgetary challenges with each wave force you to carefully balance your resources or risk replacement!
Wide variety of cards of all types means an endless mill of new strategies to try. Find the perfect approach for your style! Different buffs and elements work together to create powerful synergies.
Command from on high, looking down from the safety of your office aboard the corporate space-station. Grab a coffee between waves and carry on!
A rich sci-fi universe and story are just waiting to be discovered! Dive into your role aboard the station, the secrets of the worlds you are working on, and the wider consequences of your actions!

MIX AND MATCH TO FIND YOUR PERFECT PLAYSTYLE!<br><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/2771190/extras/264f348d63132dea784f4ca4cc5d3553.poster.avif?t=1764586631" width=600 height=276 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/2771190/extras/264f348d63132dea784f4ca4cc5d3553.webm?t=1764586631" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/2771190/extras/264f348d63132dea784f4ca4cc5d3553.mp4?t=1764586631" type="video/mp4"></video></span>

There’s no one way to win– quick reactions are just as important as careful strategy! Surviving each encounter means understanding not only the terrain, the enemies, and how to best use your tools; it means understanding what are the right tools for the job in the first place! Use elemental synergies, overlapping status effects, and precise tower placement to ensure victory!

DEATH FROM ABOVE!

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Support the battle on the ground from your seat in your space station office! Fire down special weapons with powerful elemental effects at critical moments– and the more damage you do, the more new towers and buffs you unlock with supply-drops, marking milestones! Make sure to follow the company’s strict cost-cutting requirements with each wave! It’s just another day on the job!

RAGE AGAINST THE MACHINE!

Obviously, we can’t tell you that you can turn against the company and side with the alien forces. Obviously, you can’t do that. It would be completely against company policy to do that, and against policy to tell you that you can. So you can’t.

Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.

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