Free games like SUM
Below are 8 free-to-play Steam games similar to SUM, 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 SUM page.
Ranked picks
- 1
NGU IDLE
Free-to-play alternative to SUM — no purchase or trial window. Shares Indie and Adventure with SUM.
NGU Idle is a Free To Play Idle game that's full of weird humor, tons of upgrades and hundreds of hours of content! Try out NGU Idle today and experience the joy of Numbers Going Up!
- 2
The Lab
Free-to-play alternative to SUM — no purchase or trial window.
Welcome to The Lab, a compilation of Valve’s room-scale VR experiments set in a pocket universe within Aperture Science. Fix a robot, defend a castle, adopt a mechanical dog, and more. Still not sold? It’s free!
- 3
Cinderella Phenomenon - Otome/Visual Novel
Free-to-play alternative to SUM — no purchase or trial window. Shares Indie and Simulation with SUM.
The Fairytale Curse was only the beginning...
- 4
SuchArt: Creative Space
Free-to-play alternative to SUM — no purchase or trial window. Shares Indie and Adventure with SUM.
Paint on any surfaces with numerous tools in Creative Space — a free sandbox version of SuchArt: Genius Artist Simulator. Create masterpieces, complete commissions, and decorate your studio in the most advanced artist sim!
- 5
Aircar
Free-to-play alternative to SUM — no purchase or trial window. Shares Indie and Casual with SUM.
A simple immersive flying game built for VR. Pilot an aircar through a futuristic cityscape.
- 6
The Riftbreaker: Prologue
Free-to-play alternative to SUM — no purchase or trial window. Shares Indie and Adventure with SUM.
The Riftbreaker: Prologue allows you to experience the events taking place before the story campaign of the main game. Explore an entirely new world. Gather resources. Build up a base. Defend yourself from thousands of alien creatures.
- 7
Waltz of the Wizard (Legacy demo)
Free-to-play alternative to SUM — no purchase or trial window. Shares Indie and Adventure with SUM.
Store page for the legacy demo of Waltz of the Wizard created as a prototype to showcase the power of room-scale VR. Please find the full product in the description below.
- 8
The Last Sovereign
Free-to-play alternative to SUM — no purchase or trial window. Shares Indie and Adventure with SUM.
Explore a world torn between armies of lust and purity in which everything is more complex than it seems, deciding the fate of nations through might, politics, and finance. Every decision matters in an intricate saga that tracks thousands of variables.