Free games like Underground: World War
Below are 8 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
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.
- 2
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.
- 3
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!
- 4
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.
- 5
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.
- 6
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!
- 7
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.
- 8
Guild Wars 2®
Free-to-play alternative to Underground: World War — no purchase or trial window.
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!