Games like Dungeon D14
Games like Dungeon D14 include Oxygen Not Included, RimWorld, Prison Architect, Factorio, and Space Haven. We matched them by the tags players give Dungeon D14 on Steam (Base Building, Colony Sim, Sandbox, Mining, and Resource Management): closest matches first, and among equally close ones the better-known games.

Oxygen Not Included
Shared: Base Building · Colony Sim · Resource Management

RimWorld
Shared: Base Building · Colony Sim · Sandbox

Prison Architect
Shared: Base Building · Sandbox · Colony Sim

Factorio
Shared: Base Building · Sandbox · Resource Management

Space Haven
Shared: Base Building · Colony Sim · Sandbox

Satisfactory
Shared: Base Building · Sandbox · Resource Management

Dyson Sphere Program
Shared: Base Building · Resource Management · Building

Dwarf Fortress
Shared: Colony Sim · Base Building · Sandbox

Kingdoms and Castles
Shared: Colony Sim · Resource Management · Sandbox

The Crust
Shared: Base Building · Colony Sim · Sandbox

Manor Lords
Shared: Base Building · Sandbox · Colony Sim

Mindustry
Shared: Base Building · Resource Management · Sandbox

Stationeers
Shared: Base Building · Colony Sim · Sandbox

Hydroneer
Shared: Base Building · Sandbox · Mining

Frostpunk
Shared: Resource Management · Colony Sim · Base Building

Terraria
Shared: Sandbox · 2D · Building

Planetbase
Shared: Colony Sim · Base Building · Resource Management

Settlement Survival
Shared: Colony Sim · Building · Sandbox

shapez
Shared: Base Building · Sandbox · Resource Management

Songs of Syx
Shared: Colony Sim · Sandbox · Base Building

Against the Storm
Shared: Base Building · Colony Sim · Building

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

Banished
Shared: Colony Sim · Sandbox · Resource Management

Flotsam
Shared: Base Building · Colony Sim · Sandbox