Single-player games like Flotsam
Below are 15 single-player Steam games similar to Flotsam, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Flotsam page.
Ranked picks
- 1

Timberborn
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Strategy and Indie with Flotsam.
Humans are long gone. In a world struck by droughts and toxic waste, will your lumberpunk beavers do any better? A sandbox city-building game featuring ingenious animals, vertical architecture, water physics, and terraforming. Contains high amounts of wood.
- 2

The Wandering Village
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Strategy and Simulation with Flotsam.
The Wandering Village is a city-building simulation game on the back of a giant, wandering creature. Build your settlement and form a symbiotic relationship with the colossus. Will you survive together in this hostile, yet beautiful post-apocalyptic world, contaminated by poisonous plants?
- 3

RimWorld
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Strategy and Indie with Flotsam.
A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.
- 4

Judgment: Apocalypse Survival Simulation
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Strategy and Indie with Flotsam.
Build, scavenge, craft, and perform occult rituals to survive in a demon-infested, post-apocalyptic colony simulation. Will you survive Judgment day?
- 5

Norland
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Strategy and Simulation with Flotsam.
Lead your noble family in this medieval colony sim, facing off against class conflict, religious struggle, and political treachery. Tend to your people’s needs, uncover the lost knowledge of a fallen empire, and engage in nefarious plots against your enemies.
- 6

Plan B: Terraform
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Strategy and Indie with Flotsam.
Terraform a lifeless rock into a lush and habitable world. Build trucks, trains, and sprawling factories on an enormous hexagonal planet. Grow its population to millions. Enjoy a dynamic simulation of atmosphere, temperature, water, and forests.
- 7

Against the Storm
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Strategy and Simulation with Flotsam.
A dark fantasy city builder where you must rebuild civilization in the face of apocalyptic rains. As the Queen’s Viceroy, lead humans, beavers, lizards, foxes, and harpies to reclaim the wilderness and secure a future for civilization's last survivors.
- 8

Whiskerwood
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Strategy and Simulation with Flotsam.
Establish a home for your industrious mice under the oppressive paw of your cat overlords in this city builder featuring complex simulations, intricate production chains, and the age-old rivalry between cat and mouse.
- 9

Raft
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Indie and Simulation with Flotsam.
Raft™ throws you and your friends into an epic oceanic adventure! Alone or together, players battle to survive a perilous voyage across a vast sea! Gather debris, scavenge reefs and build your own floating home, but be wary of the man-eating sharks!
- 10

Buoyancy
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Strategy and Indie with Flotsam.
Buoyancy is a city-building strategy game where you build, manage, and move a floating city on an oceanic world. Explore and scavenge resources scattered around the endless waters. Keep your villagers nourished and happy while combating fires, sickness, and pirate attacks.
- 11

Oxygen Not Included
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Indie and Simulation with Flotsam.
Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive.
- 12

Kena: Bridge of Spirits
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Indie with Flotsam.
A story-driven, action adventure combining exploration with fast-paced combat. Untangle the past as Kena, a young Spirit Guide in search of the sacred Mountain Shrine. Help free the spirits trapped in a forgotten village with the help of the Rot, her adorable (yet powerful) spirit companions.
- 13

Sable
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Indie with Flotsam.
Embark on an unique and unforgettable journey and guide Sable through her Gliding; a rite of passage that will take her across vast deserts and mesmerizing landscapes, capped by the remains of spaceships and ancient wonders.
- 14

Townscaper
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Indie and Simulation with Flotsam.
Instant town building toy. Place housing blocks and watch them transform, piece by piece, into idyllic ocean-side towns, pastoral gardens, or sweeping cities on the sea.
- 15

The Final Earth 2
Single-player alternative to Flotsam — playable solo, no multiplayer required. Shares Strategy and Indie with Flotsam.
The Final Earth 2 is a vertical sci-fi city builder. Earth is unlivable, so you decide to create a space colony. Gather resources, then build and research your way to a better future! Grow your city from an exploration ship to a huge metropolis, full of advanced technology. What will you build?