Games like Project Tarvotan
Games like Project Tarvotan include FTL: Faster Than Light, Into the Breach, Plague Inc: Evolved, Stellaris, and Kerbal Space Program. We matched them by the tags players give Project Tarvotan on Steam (Strategy, Indie, Simulation, Space, and Turn-Based Strategy): closest matches first, and among equally close ones the better-known games.

FTL: Faster Than Light
Shared: Strategy · Space · Indie

Into the Breach
Shared: Strategy · Indie · Turn-Based Strategy

Plague Inc: Evolved
Shared: Strategy · Simulation · Indie

Stellaris
Shared: Strategy · Space · Simulation

Kerbal Space Program
Shared: Simulation · Space · Indie

The Long Journey Home
Shared: Strategy · Simulation · Indie

Sid Meier’s Civilization® VI
Shared: Strategy · Turn-Based Strategy · Simulation

Battlevoid: Harbinger
Shared: Strategy · Simulation · Space

Game Dev Tycoon
Shared: Indie · Simulation · Strategy

Home Behind 2
Shared: Strategy · Indie · Simulation

ENDLESS Space™ - Definitive Edition
Shared: Strategy · Space · Turn-Based Strategy

Age of History II
Shared: Strategy · Turn-Based Strategy · Simulation

Heat Signature
Shared: Indie · Space · Strategy

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Indie

Your Only Move Is HUSTLE
Shared: Strategy · Turn-Based Strategy · Simulation

Quasimorph
Shared: Strategy · Turn-Based Strategy · Roguelike

Heroes' Vow: Three Kingdoms
Shared: Strategy · Simulation · Turn-Based Strategy

Interplanetary: Enhanced Edition
Shared: Strategy · Indie · Simulation

Mini Motorways
Shared: Strategy · Simulation · Indie

Spacebase DF-9
Shared: Simulation · Space · Strategy

Crying Suns
Shared: Strategy · Indie · Space

Space Pirates And Zombies 2
Shared: Strategy · Space · Indie

Balatro
Shared: Strategy · Roguelike · Indie

RACCOIN: Coin Pusher Roguelike
Shared: Strategy · Roguelike · Turn-Based Strategy