Free games like MASS INVASION

Below are 9 free-to-play Steam games similar to MASS INVASION, 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 MASS INVASION page.

1
Ultimate Custom Night
Free-to-play alternative to MASS INVASION — no purchase or trial window. Shares Action and Indie with MASS INVASION.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
2018ActionIndieFree To PlayFreeFree to playSimilar games →
2
ENA: Dream BBQ
Free-to-play alternative to MASS INVASION — no purchase or trial window. Shares Indie and Adventure with MASS INVASION.
Experience surreal environments and inexplicable characters as ENA in a new wild world.
2025IndieAdventureFreeDeck VerifiedFree to playSimilar games →
3
Indigo Park: Chapter 1
Free-to-play alternative to MASS INVASION — no purchase or trial window. Shares Action and Indie with MASS INVASION.
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.
2024ActionIndieAdventureFreeDeck PlayableFree to playSimilar games →
4
STRAFTAT
Free-to-play alternative to MASS INVASION — no purchase or trial window. Shares Action with MASS INVASION.
STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.
2024ActionFreeDeck PlayableFree to playSimilar games →
5
The Looker
Free-to-play alternative to MASS INVASION — no purchase or trial window. Shares Indie with MASS INVASION.
You wake up, alone, on a strangely familiar island full of puzzles that will frustrate and annoy you.
2022IndieFreeDeck PlayableFree to playSimilar games →
6
Counter-Strike:Global Offensive
Free-to-play alternative to MASS INVASION — no purchase or trial window. Shares Action with MASS INVASION.
Counter-Strike:Global Offensive (CS:GO) expands upon the team-based action gameplay that it pioneered when it was launched over 2 decades ago. CS:GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).
2012ActionFree To PlayFreeDeck PlayableFree to playSimilar games →
7
The Expendabros
Free-to-play alternative to MASS INVASION — no purchase or trial window. Shares Action and Indie with MASS INVASION.
The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.
2014ActionIndieAdventureFreeDeck VerifiedFree to playSimilar games →
8
UNBEATABLE [white label]
Free-to-play alternative to MASS INVASION — no purchase or trial window. Shares Action and Indie with MASS INVASION.
A young girl learns a song. An exclusive side-story set in the world of D-CELL GAMES' upcoming rhythm-adventure.
2021ActionIndieAdventureFreeDeck PlayableFree to playSimilar games →
9
XERA: Survival
Free-to-play alternative to MASS INVASION — no purchase or trial window. Shares Action and Indie with MASS INVASION.
Action-focused, open world survival shooter, PvPvE against fellow mercenaries and lethal XOIDS. Raid for resources alone or with team-mates, build and defend your base, stash your gear and survive against the odds. You are the hunters. You are the hunted. And the robots never sleep…
2021ActionStrategyIndieFreeDeck PlayableFree to playSimilar games →

Ranked picks