Cerys

You discover Cerys, a moon of Fulgora whose ruins lie frozen under a thick layer of dry ice. As you touch down, methane ice crystals scatter into the vacuum. Asteroids wander overhead, along with a gentle solar wind under Fulgora’s magnetic influence.

The moon's play area is finite. Features of the terrain curve as you approach the edge. Fulgora can be seen in the background. As dark settles, the day-night boundary travels across the moon's surface. The mod's mechanics are adapted to work well in a closed environment, so even though space is limited, you can easily scale a factory here.

Methane ice, nitrogen-rich minerals, and nuclear scrap can be found on the surface. Along with the belts, pipes modules and other starting materials found in the surface ruins, the engineer must jumpstart a factory to reverse-engineer Cerysian technologies and progress in the tech tree.

Many frozen structures lie embedded in the surface. Though made of new materials, they bear the hallmarks of the Fulgorans. As you explore, it becomes apparent that without lightning, they turned to another source of power.

Defrosted wrecks can be restored to working order using repair mechanics unique to the moon. The heating mechanic is also novel, making for a very different gameplay experience to Aquilo.

Eventually, one can rediscover lost knowledge about the workings of plutonium on Cerys. This supports new reactors, a new radioactive module, and powerful hydrogen and neutron bombs that can blast a hole in the Cerys magnetosphere and allow the safe landing of cargo.

Originally designed in the two months following the Space Age release, Cerys aims to be equal or higher quality to the official planets.

It is balanced against vanilla and there are zero changes to vanilla items, recipes or features for easy compatibility.

Completing Cerys rewards the engineer with the Flare stack to void fluids, plutonium-based equipment and weaponry, holmium plate productivity research, a T4 productivity module that decays to a T2.5 equivalent (plus a bidirectional inserter to insert and remove it from machines), and more.

Reviews

"one of the best mods ever made. every recipe has a purpose. does not waste your time." — notnotmelon
“This is a GREAT mod” — MelodicBreadfruit938
"Extremely impressed at how several space age systems work together" — PlzPuddingPlz

Related Mod

You may enjoy these first-party mods for Cerys:

Cerys Start
- This lets you play Cerys without an existing save.
Hard Cerys

Cerys is now stable enough that we encourage other mods to build on top. You can find many third-party mods for Cerys on the portal.

The Cerys mod has dependencies Flare Stack and PlanetsLib. At launch, Cerys contained its own port of Flare Stack to 2.0. We later assisted snouz to port the original mod. As a result, with Cerys installed, the Flare stack is moved to the Cerys tech tree and the Incinerator is disabled.

Localization

English, Chinese, French, Ukrainian, Korean, Russian, Japanese, German.
- To update the translations or translate more languages, you can submit a pull request on Github (after playing the game to get context.) Please note that some locale lines are stored in the PlanetsLib Github.

Credits

Gameplay, code and design is by thesixthroc. I enjoy talking to players, please find me in Discord.

Art and creative collaboration by Tserup.

Special thanks:

Creators of open-source assets used in the mod, as detailed in the Credits file, especially Scott Buckley in particular whose tracks found a perfect home.
snouz for many items of graphical polish and the graphics for the teleporter.
thelordthygod, bunshaman, noodlebox, Quezler, notnotmelon, Samario, Nuker299 and degasus for technical contributions.
Schlumpf, Astorin, Betanona, cyx2015s, Houraiji-Kyuusyou, Fr-Dae, click0, GafarovMaxim for contributing translations.
Baroque Tier, Samario, NekoBaron, rjdunlap, xbarsigma, Preceti, notnotmelon, LunarNex, Ellthan, Tetlanesh, Sapheroni, Volodath, Fallen, Citizen Joe, Another Zach, Frontrider, Loup&Snoop, sourcerator, Ellthan, hgwaz, Tsumiki Miniwa, lachtan, boomshroom, Magix39 and others for valuable feedback.