Techtonica Factories in a glowing alien world

You start with the basics for digging and mining, and grow from there. Conveyor belts, inserters and a wide cast of machines turn scattered ore into automated production lines, and the systems keep evolving as new challenges unlock new solutions. The terrain itself is part of the design: the MOLE, a black hole gun, erases stone walls so you can carve exactly the space your factory needs. You route belts around a pillar you decided to keep, widen a chamber for one more assembler row, and watch the whole thing hum without you. Eco-brutalist building parts let the factory look as deliberate as it runs.

Something went wrong on the rogue planet Calyx, and untangling it is the spine of the game. This is the only factory automation game with a full, fully voice-acted campaign: you revive the efforts of an expedition gone wrong, helped by cubic companions who have personalities, motives and secrets of their own. Exploration feeds the story. Tunneling to hidden caves and research-rich facilities turns up technologies to unlock and aging artifacts to scan, and corrupted audio logs hint that stranger things are going on than the machines let on. The planet is strangely beautiful about it, lit by bioluminescent flora in every direction.

If you like founding something from nothing and watching it grow, Techtonica works as a city builder turned inside out. Instead of zoning districts, you plan districts of production: where the miners go, where the smelters go, how power reaches them, and which lines feed which. Your settlement is a subterranean factory, but the pleasures are the same, balancing resources, power and output as the operation swells from a single digger into an interconnected sprawl. And because the world is first-person, you can walk the streets of your own creation, past every belt you placed by hand.

The survival crafting loop is here without the hunger and the wolves. You begin with only the basics, gather ore and resources by hand, craft the tools that let you dig higher toward the surface, and build a base that expands over everything you uncover. The twist is that the terrain is yours to reshape: pump deserts dry of sand to see what lies beneath, blast tunnels with the black hole gun, and sculpt whole caves to fit your plans. Exploration pays at every step, from massive ore deposits to hidden caves holding new technologies. It is a calm, low-pressure kind of survival, where the thing you reinforce is the planet itself.

Techtonica is entirely playable alone, or in co-op with up to four players total. That changes the shape of the work: one of you runs the mining lines, someone else sorts power, another goes off tunneling after artifacts, and the factory comes together faster and messier than any solo build. There are no timers or punishing failure states to race, so a session is as social or as focused as your group wants it. It is a relaxed game to have running on a weeknight, belts snaking across a glowing cave while everyone argues about where the next smelter should go.