Free games like Underground: World War
Below are 9 free-to-play Steam games similar to Underground: World War, 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 Underground: World War page.
Ranked picks
- 1
Electoral Carnage
Free-to-play alternative to Underground: World War — no purchase or trial window. Shares Action and Early Access with Underground: World War.
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?
- 2
Shape of Dreams: Prologue
Free-to-play alternative to Underground: World War — no purchase or trial window. Shares Action and Indie with Underground: World War.
《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.
- 3
Wires And Whiskers
Free-to-play alternative to Underground: World War — no purchase or trial window. Shares Action and Indie with Underground: World War.
Wires and Whiskers is a local co-op action-puzzle game where two players control a lab-engineered gerbil and its magnetic exosuit. Work together to fight mutated enemies, solve magnetic puzzles, and survive in a ruined, post-apocalyptic trench world.
- 4
THE FINALS
Free-to-play alternative to Underground: World War — no purchase or trial window. Shares Action with Underground: World War.
THE FINALS is the world’s first Dynamism Shooter, a free-to-play, fast-paced, physics-driven, first-person shooter set on the stage of the biggest Gameshow of the future! Fight for Fans and fortune in fully-destructible, virtual Arenas that guarantee no two rounds will ever play the same!
- 5
Crab Game
Free-to-play alternative to Underground: World War — no purchase or trial window. Shares Action and Indie with Underground: World War.
Crab Game is a First-Person Multiplayer game where you play through several different minigames based on children's games, until only one player stands victorious.
- 6
Where Winds Meet
Free-to-play alternative to Underground: World War — no purchase or trial window. Shares Action with Underground: World War.
Step into an open-world action-adventure RPG set in ancient China. Uncover the secrets of your own identity as you rise from a humble village wanderer to the sword master of the imperial capital. Learn martial arts and build your reputation as a hero or a bringer of chaos in this free wuxia world.
- 7
Bloons TD Battles 2
Free-to-play alternative to Underground: World War — no purchase or trial window. Shares Action and Indie with Underground: World War.
From the creators of Bloons TD6... Bloons TD Battles 2 is a brand new installment of the top-rated head-to-head tower defense game. Gather your Hero, choose your team of powerful Monkey Towers, and prepare to battle one on one against other players and relentless waves of Bloons!
- 8
Combat Master: Season 5
Free-to-play alternative to Underground: World War — no purchase or trial window. Shares Action with Underground: World War.
Join fast-paced action-packed combat. Play Combat Master -- AAA experience on any hardware. Best-in-class multiplayer gunfight. Next-level extreme performance. Lightning-speed loading time and a whole lot more.
- 9
Without Sanctuary
Free-to-play alternative to Underground: World War — no purchase or trial window. Shares Action with Underground: World War.
Without Sanctuary is an underground fighting game set inside the El-Malo nightclub. No rules, no mercy—only raw combat. Choose powerful or fast fighters, battle for glory, and claim the prize in brutal fight nights where only one survives.