A downloadable game for Windows

Temporarily unlisted.

This is a tech demo for an easily moddable 2D sidescroller sandbox I am developing on and off in my free time since 2023.

The idea is to create a magic-filled universe to explore, inspired by Calamity and the Arcana mod — you can fly around using a spaceship you build yourself. It's not there yet, but I made the engine to build this on.

This demo has:

✦ Forest planets, pale moons, space wharf stations.
✦ Fun building system with lots of paints, coatings and funky block shapes. Enable debug mode to play around with all 400 items.
✦ Modular spaceships, landable on planet surfaces.
✦ Find, repair and scan starmaps to unlock new star systems.
✦ Lore! Type "book all" in the debug console to unlock all lore instantly.

Structures, biomes, planets, parallaxes, starsystems, furniture, crafting, clothing, items, mobs, tiles — all are entirely data‑driven, and you can create your own content packs. Dungeon creation and testing tools are built into the game.

What I hope to add:

More unique, magical biomes, planets and moons.

➤ More enemies.
➤ City-planets, farms, monasteries and stations with human NPCs.
➤ Unlockable predefined static starsystems.
➤ Radio signals, NPC calls across planets, semi-random quests.
➤ Other scenarios with unique quests. Party members.
➤ Fuel and crew system for ships.
➤ Purchase of additional ships.
➤ Rescue ships, trader ships, crashlanded ships, pirate encounters and ship combat.
➤ Quadruped playable race.
➤ Optional bosses.
➤ Full C# modding support.

I decided to cut some content and release a small tech demo to get inspiration from seeing people try it out. This is that demo, with actual game coming in the future.

Expect bugs. This demo was not playtested at all, and I haven't touched it in months.

Credits & Acknowledgments

I did most of the graphics and some of the music myself, but some assets were borrowed. Huge thanks to these creators:

UI Sounds:

HoveAudio – Free Sci-Fi UI Sound Effects Pack

Animals:

Riria – Beasts SFX Vol.1
Walking and stepping sounds by Daniel Foth
"Water Swirl, small" by InspectorJ
Nox Sound – Essentials Series SFX

Visual Assets & Animations:

brullov – Fire Animation
Norma2D – Celestial Objects Pixel Art Pack
kassjack – 20 Clouds Pack
Sentient Dream Games – Pixel Effects Explosions Pack 01
Frostwindz – Pixel Art Animations

Other Assets:

Yukipixels – BoldPixels
Datagoblin – Monogram
Erytau – Pixuf
Music by Abstraction – abstractionmusic.com

More information

Updated	2 days ago
Published	8 days ago
Status	In development
Platforms	Windows
Author	AlmondLynx
Genre	Adventure
Made with	Aseprite, MonoGame
Tags	2D, Cozy, Open World, Pixel Art, Procedural Generation, Relaxing, Sandbox, Side Scroller, Singleplayer, Space
Average session	A few minutes
Languages	English
Inputs	Keyboard, Mouse
Accessibility	Configurable controls

Download

This game is currently unavailable

Codex Astrea [Alpha]