RimWorld Odyssey

RimWorld Odyssey is an expansion about building a gravship and taking your colony across the planet and into orbit. You can land to hunt for treasure, gather food and fuel, and bring back finds such as exotic birds, long-forgotten gravtech and a gold-plated charge rifle. Your ship begins with a grav engine, a few rooms and enough chemfuel to take off; as your colony grows, you can turn it into a travelling home with labs, living quarters, workshops and other facilities. Rare gravcores let you expand the ship and travel farther.

Build and travel

You can land in varied landscapes to find resources and places to explore. Gravcores are found in dangerous locations such as crashlanded orbital platforms, insect-infested caves and trapped, broken-down reactors. The new landmarks system combines with the biomes to create varied landscapes.

The biomes each pose different challenges:

• Glowforest: Bioluminescent mushrooms and psychedelic spores glow in permanent darkness, while geothermal vents release sulfur. Normal plants cannot grow, so you must survive on fungi.
• Scarlands: These war-torn city ruins have cratered roads, heat and gas vents, and constant toxic rain. Mechanoids stalk the area, and the surviving animals are dangerous mutants.
• Grasslands: Fertile fields offer long, productive growing seasons, while strong winds provide power for turbines. Trees are rare, and droughts and brushfires threaten farms.
• Glacial plains: Blizzards cover the land, where mastodons roam and scimitar cats hunt. You can carve shelters into ice or seek refuge in buried frozen ruins.
• Lava fields: Molten rivers can suddenly swallow animals, buildings and colonists. Volcanic debris falls from the sky, and thick ash makes breathing difficult. Barriers can divert lava, while cloth masks protect your lungs.

Landmarks include cliffs, chasms, crevasses and valleys where you can dig colonies into rock for natural defenses; islands, archipelagos, atolls, peninsulas and fjords suited to coastal fishing villages built on heavy bridges; abandoned colony buildings to repurpose; and ancient structures to raid for chemfuel, weapons, components, minerals and other resources.

Explore orbit

You can fly your gravship into orbit and land on collapsed platforms, ore-rich asteroids and hollowed-out satellites. Search debris for treasure, but expect to compete with other orbital scavengers. Mechanoid wrecks contain advanced gravtech and ship resources, guarded by ancient defenses.

Space requires its own protections. Airtight walls shield colonists and pets from vacuum, heaters keep the ship warm, and oxygen pumps provide life support. Airlocks with vac barriers prevent depressurization, and colonists need vac suits before going outside.

Animals and fishing

The expansion adds over 40 animals that you can tame, train, trade or eat. You can raise sparrows and bluebirds, train hunting packs of scimitar cats and great wolves, swim with seals and otters, or keep porcupines and prairie dogs as pets. Animals can comfort colonists by nuzzling them, dig and forage for resources, and hunt enemies. A sentience catalyst can make even creatures with simpler minds, such as hermit crabs, into vigilant protectors. You can also fish for tuna, marlin and less common catches.

Quests and encounters

Quests come from ancient maps, passing visitors and anonymous signals. They include tracking the mythical alpha thrumbo by following its herd, with its priceless razor-sharp horn as a possible prize, and raiding ancient mercenary crypts where soldiers have recently awoken from cryptosleep. The crypts hold glitterworld supplies, and the gang leader carries a valuable weapon.

Other missions take you to abandoned orbital platforms and derelict satellites, where hostile salvage crews compete for loot. Orbital fugitives may be hiding in the wreckage, alongside defensive turrets, traps and leftover mechanoids. Asteroid mines contain plasteel, uranium and gold, but pirates and space debris make them dangerous.

Weapons and enemies

A unique weapon system lets you arm colonists with special weapons they find. These include a sawed-off shotgun that clears a room quickly, an AI-assisted rifle scope that improves a poor shooter’s accuracy, and a fully golden revolver.

New threats include hunter drones that chase targets and explode on contact, wasp drones that paralyze prey with needles, ancient sentries that patrol ruins with scatterguns, and a cyclops mechanoid that attacks with shield-piercing gamma beams. Deep underground, an insect hive queen stirs among her spawn.

The mechhive

High above the planet, the mechhive sends out endlessly reproducing mechanoids that keep attacking until every human is dead. When you reach the mind behind them, you must choose whether to destroy it and shut down every mechanoid for good or take control of its power.