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SKYGUARD: Last Light playtest
by tntsg
A minimalist incremental defense game. Start with one missile silo over your city, destroy screens full of threats, upgrade your firepower, and turn the Moon, the Sun, a black hole and even higher dimensions into weapons. Ten scales, ten chapters, ten doomsday ultimates.
Anyone with a Steam account can join, and it's free.
- Access
- Instant
- On playtest since
- Nov 5, 2026
- Planned release
- Nov 2026
- Developer
- tntsg
- Platforms
- Windows
- Players
- Single-player
- Languages
- Arabic, English, French, German and 7 more
How to join the SKYGUARD: Last Light playtest
- Open the game's Steam page with the Join playtest button. Sign in to Steam if it asks.
- Use the SKYGUARD: Last Light playtest signup there. You're in straight away, with nothing to pay.
- The playtest shows up in your Steam library, ready to install and play.
New to playtests? How Steam playtests work
How AI is used
Generative AI was used to assist with writing and translating store descriptions. The game does not use generative AI during gameplay or generate AI content in real time.
The developer's own words, from Steam.
About SKYGUARD: Last Light
New Mode: Core Siege
No turrets, only the core. Type a string of arrow keys and the core transforms into a weapon on the spot, shattering the incoming meteors. Each of the 17 weapons has its own parts and sounds; unbroken correct input raises overload, and at the top tier the weapon switches to a stronger form. Unlocks after Chapter 2.
The First Missile
A city-killer asteroid is falling toward your city, and all you have is one missile silo. Destroy the incoming threats, earn money and upgrade your firepower. Your defense starts in the sky ten kilometres above the city.
Turn the Cosmos into Weapons
Rooftops, the Moon, the Sun, Jupiter, a black hole… all 50 celestial bodies in the game can be converted into weapons, each with its own attack. The Sun is wrapped in a Dyson sphere, and the black hole at the galactic centre becomes an engine.
More Firepower
Every chapter unlocks a main weapon with a whole new attack: missile salvos, kinetic rods, gravity wells, pulsar beacons, quasar jets… with up to 48 turrets firing alongside.
Defense Circuit
Upgrade through a circuit board, lighting up chips to unlock new mechanics. There are even elemental reactions.
Ten Ultimates
Droplet
Fourier Decomposition: everything the pen tip passes detonates.
Mandelbrot
Ten Bosses
Every chapter has a giant threat: a city-killer asteroid, a magnetar, an alien megastructure warship, a cosmic catastrophe core… each with its own skill and energy layer. Interrupt its skill while the boss charges up, and click the boss's weak points to focus all your firepower and destroy the boss before time runs out.
Difficulty That Builds Step by Step
The Bastion throws a shield over the enemies around it, blocking most of the damage for them.
Ten Scales
City → Earth → Inner Solar System → Outer Solar System → Oort Cloud → Stellar Neighbourhood → Milky Way → Supercluster → Observable Universe → The Brane. Finish a chapter and your defense jumps with you to the next scale.
Star Chart and Doom Levels
The score you earn each run is called Afterglow, and you can spend it on the Star Chart for permanent upgrades. Every victory unlocks the next Doom Level, up to level 10.
Beyond the Universe
Your Pace
- Pause anytime, ×1 / ×2 speed
- Autosave with Steam Cloud
- Steam Achievements
- 11 languages, including English and Simplified Chinese
- Journey of Scales chapter select: replay any chapter you have reached on its own
- Screen effects adjustable one by one: CRT curvature, scanlines, colour fringing, glow… or back to the original black and white in one click
- Accessibility: turn off camera motion, reduce effects, separate music and effects volume
- Fully playable with just the mouse
From the game's Steam page.
