Games like Buoyancy
Games like Buoyancy include Frostpunk, Banished, RimWorld, They Are Billions, and Oxygen Not Included. We matched them by the tags players give Buoyancy on Steam (Colony Sim, Strategy, Indie, Early Access, and City Builder): closest matches first, and among equally close ones the better-known games.

Frostpunk
Shared: Strategy · City Builder · Colony Sim

Banished
Shared: Colony Sim · Strategy · City Builder

RimWorld
Shared: Colony Sim · Strategy · Base Building

They Are Billions
Shared: Colony Sim · Strategy · Base Building

Oxygen Not Included
Shared: Colony Sim · Base Building · Survival

Infection Free Zone
Shared: Strategy · Base Building · City Builder

Endzone - A World Apart
Shared: Strategy · City Builder · Survival

Kingdoms and Castles
Shared: Colony Sim · City Builder · Strategy

Manor Lords
Shared: Strategy · City Builder · Base Building

Dawn of Man
Shared: Colony Sim · Strategy · City Builder

Dwarf Fortress
Shared: Colony Sim · Strategy · Base Building

Frostpunk 2
Shared: Strategy · City Builder · Survival

Against the Storm
Shared: Strategy · City Builder · Base Building

Planetbase
Shared: Colony Sim · Strategy · City Builder

Going Medieval
Shared: Colony Sim · Strategy · Base Building

Life is Feudal: Forest Village
Shared: Colony Sim · Strategy · City Builder

IXION
Shared: Strategy · City Builder · Colony Sim

Rise to Ruins
Shared: Colony Sim · Strategy · City Builder

Ostriv
Shared: Strategy · Colony Sim · City Builder

Kingdoms Reborn
Shared: Colony Sim · City Builder · Strategy

Songs of Syx
Shared: Colony Sim · Strategy · City Builder

Workers & Resources: Soviet Republic
Shared: Strategy · City Builder · Base Building

Stonehearth
Shared: Colony Sim · City Builder · Strategy

Empires of the Undergrowth
Shared: Strategy · Colony Sim · City Builder