Free games like G Prime
Below are 9 free-to-play Steam games similar to G Prime, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like G Prime page.
Ranked picks
- 1
Steam Engine Simulator
Free-to-play alternative to G Prime — no purchase or trial window. Shares Simulation with G Prime.
The Steam Engine Simulator shown on AngeTheGreat's YouTube channel.
- 2
Learn to Fly 3
Free-to-play alternative to G Prime — no purchase or trial window. Shares Indie with G Prime.
Build your spaceship from scratch, earn funds and invest them into building a bigger, better spaceship as you try and fly your way up to space!
- 3
Nimbatus - Drone Creator
Free-to-play alternative to G Prime — no purchase or trial window. Shares Indie and Simulation with G Prime.
Use the Nimbatus Drone Creator to construct physically simulated drones and try them out in a virtual testing environment. Do you have what it takes to become a drone engineer?
- 4
Sputnika Game
Free-to-play alternative to G Prime — no purchase or trial window. Shares Indie with G Prime.
A Cosmic twist on a Suika-style game with space gravity. Help our little friend Sputnik on his journey to become the Sun.
- 5
Machizzle
Free-to-play alternative to G Prime — no purchase or trial window. Shares Indie and Simulation with G Prime.
Physics bending VR puzzle game - get your ball to the goal, by obeying the laws of physics. Or bending them to your will.
- 6
Lonely Astronaut
Free-to-play alternative to G Prime — no purchase or trial window. Shares Indie and Simulation with G Prime.
Pilot the corpse of a long-abandoned astronaut floating in a cosmic graveyard in this one-button arcade game. In the process, you might find out something about the human condition. But probably not.
- 7
Orbital Physics Simulator
Free-to-play alternative to G Prime — no purchase or trial window. Shares Indie and Simulation with G Prime.
Master physics in this hardcore orbital simulator where Einstein’s theories come to life. Plot trajectories and manipulate spacetime via general relativity, time dilation, and length contraction. Command your starship, outrun time, and explore a universe governed by real physics.
- 8
Orbit-X
Free-to-play alternative to G Prime — no purchase or trial window. Shares Indie and Simulation with G Prime.
Launch a rocket. Extend the Antenna. Set your internet service price and start making money. Oh and shoot down asteroids if they threaten your satellites.
- 9
The Howler
Free-to-play alternative to G Prime — no purchase or trial window. Shares Indie and Simulation with G Prime.
Use gravity, tension, and wind currents to get your hot air balloon to its destination, dropping off cargo on your way, in this ultra-challenging physics-based game. All art used in the Howler was meticulously created by classically-trained experienced painters.