Free games like Underworld
Below are 9 free-to-play Steam games similar to Underworld, 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 Underworld page.
Ranked picks
- 1
Indigo Park: Chapter 1
Free-to-play alternative to Underworld — no purchase or trial window. Shares Action with Underworld.
Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.
- 2
Electoral Carnage
Free-to-play alternative to Underworld — no purchase or trial window. Shares Action with Underworld.
Electoral Carnage is an absurd 2D fighting game featuring America's most famous (and infamous) politicians. If you don't download it you hate America. Also JFK can assassinate himself. What more do you need to know?
- 3
Shape of Dreams: Prologue
Free-to-play alternative to Underworld — no purchase or trial window. Shares Action with Underworld.
《Shape of Dreams: Prologue》is a unique game that blends action roguelite with MOBA-style gameplay. Edit your character's Memories to create your own champion. Face all challenges alone or play with friends in up to 4-player co-op.
- 4
Nazi Zombies
Free-to-play alternative to Underworld — no purchase or trial window. Shares Action with Underworld.
Nazi Zombies is a cooperative survival game where players fend off escalating waves of Nazi zombies, earning points by killing zombies and repairing barriers to buy weapons, upgrades, perks, and unlock new map areas to maximize their survival.
- 5
Muck
Free-to-play alternative to Underworld — no purchase or trial window. Shares Action with Underworld.
Muck is a survival-roguelike. Collect resources, find items & build a base to survive for as long as you can.
- 6
Wuthering Waves
Free-to-play alternative to Underworld — no purchase or trial window. Shares Action and RPG with Underworld.
Wuthering Waves is a story-rich open-world action RPG with a high degree of freedom. You wake from your slumber as Rover, joined by a vibrant cast of Resonators on a journey to reclaim your lost memories and change the world.
- 7
Guild Wars 2®
Free-to-play alternative to Underworld — no purchase or trial window. Shares RPG with Underworld.
Guild Wars 2 is an award-winning online roleplaying game with fast-paced action combat, deep character customization, and no subscription fee required. Choose from an arsenal of professions and weapons, explore a vast open world, compete in PVP modes and more. Join over 16 million players now!
- 8
Omega Strikers
Free-to-play alternative to Underworld — no purchase or trial window. Shares Action with Underworld.
It's either not for you or the best thing you ever played
- 9
Age of Conan: Unchained
Free-to-play alternative to Underworld — no purchase or trial window. Shares Action and RPG with Underworld.
Age of Conan: Unchained is an award-winning and critically acclaimed massively multiplayer online game set in the sexy, savage and brutal world of Conan the Barbarian. Tread in the footsteps of the greatest fantasy hero of all time, and explore the vast reaches of Hyboria.