Free games like 四魂-X Shikon-X Astro Defense Fortress
Below are 9 free-to-play Steam games similar to 四魂-X Shikon-X Astro Defense Fortress, 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 四魂-X Shikon-X Astro Defense Fortress page.
Ranked picks
- 1
Doki Doki Literature Club!
Free-to-play alternative to 四魂-X Shikon-X Astro Defense Fortress — no purchase or trial window. Shares Indie and Casual with 四魂-X Shikon-X Astro Defense Fortress.
The Literature Club is full of cute girls! Will you write the way into their heart? This game is not suitable for children or those who are easily disturbed.
- 2
Life is Strange - Episode 1
Free-to-play alternative to 四魂-X Shikon-X Astro Defense Fortress — no purchase or trial window. Shares Action and Adventure with 四魂-X Shikon-X Astro Defense Fortress.
Episode 1 now FREE! Life is Strange is an award-winning and critically acclaimed episodic adventure game that allows the player to rewind time and affect the past, present and future.
- 3
Helltaker
Free-to-play alternative to 四魂-X Shikon-X Astro Defense Fortress — no purchase or trial window. Shares Indie and Adventure with 四魂-X Shikon-X Astro Defense Fortress.
Helltaker is a short game about sharply dressed demon girls.
- 4
Ultimate Custom Night
Free-to-play alternative to 四魂-X Shikon-X Astro Defense Fortress — no purchase or trial window. Shares Action and Indie with 四魂-X Shikon-X Astro Defense Fortress.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 5
ENA: Dream BBQ
Free-to-play alternative to 四魂-X Shikon-X Astro Defense Fortress — no purchase or trial window. Shares Indie and Adventure with 四魂-X Shikon-X Astro Defense Fortress.
Experience surreal environments and inexplicable characters as ENA in a new wild world.
- 6
The Murder of Sonic the Hedgehog
Free-to-play alternative to 四魂-X Shikon-X Astro Defense Fortress — no purchase or trial window. Shares Indie and Casual with 四魂-X Shikon-X Astro Defense Fortress.
Sonic the Hedgehog...was murdered!? Get to the bottom of the mystery in this brand-new adventure!
- 7
Indigo Park: Chapter 1
Free-to-play alternative to 四魂-X Shikon-X Astro Defense Fortress — no purchase or trial window. Shares Action and Indie with 四魂-X Shikon-X Astro Defense Fortress.
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.
- 8
STRAFTAT
Free-to-play alternative to 四魂-X Shikon-X Astro Defense Fortress — no purchase or trial window. Shares Action with 四魂-X Shikon-X Astro Defense Fortress.
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.
- 9
Space Pilgrim Episode I: Alpha Centauri
Free-to-play alternative to 四魂-X Shikon-X Astro Defense Fortress — no purchase or trial window. Shares Indie and Adventure with 四魂-X Shikon-X Astro Defense Fortress.
Captain Gail Pilgrim has been flying starships since she was a kid, ferrying passengers between planets and space stations across the galaxy. She has no reason to expect that this latest trip to Alpha Centauri will be anything special, even if her passengers are a little more diverse than usual....