Free games like Astro Protocol
Below are 8 free-to-play Steam games similar to Astro Protocol, 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 Astro Protocol page.
Ranked picks
- 1
Moonring
Free-to-play alternative to Astro Protocol — no purchase or trial window.
A dark-fantasy, turn-based, retro-fusion of classic turn-based RPGs and roguelikes, all presented with a unique neon aesthetic.
- 2
Die in the Dungeon: Origins
Free-to-play alternative to Astro Protocol — no purchase or trial window. Shares Strategy with Astro Protocol.
Fight your way through a mysterious dungeon in this deck-building, turn-based roguelike game where you don't use cards, but DICE! Deal with enemies by combining dice on your board, boost their effects with magical relics, and discover the story behind Die in the Dungeon!
- 3
South Scrimshaw, Part One
Free-to-play alternative to Astro Protocol — no purchase or trial window.
South Scrimshaw is the story of a newborn whale in a vast alien ocean. It is a richly illustrated experimental visual novel, written in the style of a nature documentary.
- 4
The Riftbreaker: Prologue
Free-to-play alternative to Astro Protocol — no purchase or trial window. Shares Strategy with Astro Protocol.
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.
- 5
Shape of Dreams: Prologue
Free-to-play alternative to Astro Protocol — no purchase or trial window.
《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.
- 6
PlanetSide 2
Free-to-play alternative to Astro Protocol — no purchase or trial window.
PlanetSide 2 is an all-out planetary war, where thousands of players battle as one across enormous continents. Utilize infantry, ground and air vehicles, and teamwork to destroy your enemies in this revolutionary first-person shooter on a massive scale.
- 7
Limbus Company
Free-to-play alternative to Astro Protocol — no purchase or trial window.
As the Executive Manager of Limbus Company, lead your group of twelve Sinners, venture into the buried facilities of Lobotomy Corporation, and lay claim on the Golden Boughs.
- 8
Dota Underlords
Free-to-play alternative to Astro Protocol — no purchase or trial window. Shares Strategy with Astro Protocol.
Hire a crew and destroy your rivals in this new strategy battler set in the world of Dota. Introducing Season One: Explore White Spire and earn rewards on the Battle Pass. Pick from several different game modes, play on your own or with friends, and take advantage of crossplay on PC and mobile.