73%Strong matchAI War 2
88%1k88% positive reviews, Very Positive across 1k reviews·4X · Grand Strategy
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Every alien race in this game is real. Pick a faction, deploy waves of canonical aliens onto one shared lane, push to destroy the enemy base. A real-time auto-battler grounded in The Alien Races Book.
The Reptilians. The Tall Whites. The Anunnaki. The Greys. ARB: Alien Races Battle is a real-time auto-battler set in the universe of The Alien Races Book — a catalogue of 60+ alien races, their homeworlds, and their first-contact records with humanity. Every race in the game comes from the book. Every homeworld is mapped to a real star. Every first-contact date is the date the book records.

Pick a faction. Place units on a 10×10 formation grid. Every 30 seconds, a wave auto-deploys into a single shared lane. Your army marches. The enemy's army marches. They collide.
You don't control individual units. You don't click in combat. You compose. Spend mana on better units, doctrine upgrades, faction specials, and defensive towers. Hold mid-lane for income. First side to destroy the enemy base wins.

It's the Direct Strike auto-battler tradition — proven mechanics, distilled — wrapped in an alien universe no other indie studio can put on their box.
Each faction is a book-canonical agenda — grouped by what its races actually want from Earth, not generic sci-fi templates. Each plays distinctly:

✓ All 5 factions fully playable (60+ units, 80+ abilities)
✓ Single-player vs AI with three difficulty tiers (Aggressive, Balanced, Turtle)
✓ 1v1, 2v2, and 3v3 online multiplayer via Steam Lobbies + Steam Networking
✓ Star Map — interactive sky with 42 documented alien homeworlds
✓ Earth Log — geographic catalogue of 107 documented sightings
✓ Field Manual codex with every race's full lore, stats, and animated portrait
✓ 19+ track original soundtrack by NPNS
✓ Mobile + Steamdeck Playable
+ 1, 2, and 3 player SURVIVAL MODE
+ Steam Stats and Achievements
→ 3v3 ranked multiplayer with Steam matchmaking (completed)
→ Disconnect / reconnect handling with AI fallback (completed, fallback not needed)
→ Replay system + spectator mode (completed)
→ Additional units within each faction (drawn from book canon)
→ More T2 and T3 doctrine upgrades (completed)
→ Steam Workshop support for community-created factions
→ Tournament + scrim infrastructure
→ New Survival waves, modifiers, and co-op leaderboards
→ Official Steam Deck Verified status
→ Audio polish and additional soundtrack
ARB is built solo by Raphael Tremblay — the curator of The Alien Races Book. The game and the book share the same canon, the same races, the same homeworlds, the same first-contact dates. Other indie auto-battlers invent their lore. ARB inherits one.
Find the book at .
The game lives here. Wishlist to follow development as factions, units, and multiplayer modes ship through Early Access toward 1.0.
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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The best games like ARB: Alien Races Battle are AI War 2, Alien Marauder, Xenonauts 2, Terra Invicta, and NEBULOUS: Fleet Command.
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