Free games like Sentinel 3: Homeworld
Below are 8 free-to-play Steam games similar to Sentinel 3: Homeworld, 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 Sentinel 3: Homeworld page.
Ranked picks
- 1
The Riftbreaker: Prologue
Free-to-play alternative to Sentinel 3: Homeworld — no purchase or trial window. Shares Strategy and Indie with Sentinel 3: Homeworld.
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.
- 2
SCP: Secret Laboratory
Free-to-play alternative to Sentinel 3: Homeworld — no purchase or trial window. Shares Indie with Sentinel 3: Homeworld.
Deep within a secure underground facility, a sudden containment breach allows many of the secured anomalies to escape from their chambers. Assist the Foundation in re-securing the facility, help the Insurgency in their goal to capture it, or wreak havoc as an SCP in a frantic bid to escape.
- 3
Splitgate
Free-to-play alternative to Sentinel 3: Homeworld — no purchase or trial window. Shares Indie with Sentinel 3: Homeworld.
Splitgate is a free-to-play, fast-paced multiplayer shooter that features player-controlled portals. This sci-fi shooter takes the FPS genre to a new dimension with its portal mechanics, delivering high-flying, multi-dimensional combat.
- 4
Bloons TD Battles 2
Free-to-play alternative to Sentinel 3: Homeworld — no purchase or trial window. Shares Strategy and Indie with Sentinel 3: Homeworld.
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!
- 5
Bloons TD Battles
Free-to-play alternative to Sentinel 3: Homeworld — no purchase or trial window. Shares Strategy with Sentinel 3: Homeworld.
Go head to head with other players in a Bloon-popping battle for victory. From the creators of best-selling Bloons TD 5, this all new Battles game is specially designed for multiplayer combat, featuring the ability to control bloons directly and send them charging past your opponent's defenses.
- 6
Endless Sky
Free-to-play alternative to Sentinel 3: Homeworld — no purchase or trial window. Shares Indie with Sentinel 3: Homeworld.
Endless Sky is a 2D space trading and combat game inspired by the classic Escape Velocity series. Work your way up from a relatively wimpy shuttle, cargo ship, or fighter, to a highly upgraded and customized flagship or to a massive fleet of warships or freighters.
- 7
Yet Another Zombie Defense
Free-to-play alternative to Sentinel 3: Homeworld — no purchase or trial window. Shares Strategy and Indie with Sentinel 3: Homeworld.
Darkness is coming. How long can YOU survive? Build your base by day, defend it by night. Play in online or local co-op. Stay alive as long as you can.
- 8
AirMech
Free-to-play alternative to Sentinel 3: Homeworld — no purchase or trial window. Shares Strategy and Indie with Sentinel 3: Homeworld.
AirMech® Strike is a fast paced Action-RTS game that can be played solo, coop, or competitively online. Earn Kudos and Experience in battle and unlock a wide collection of AirMechs and Units while you practice the perfect strategy to emerge victorious!