Single-player games like Octo Armada
Below are 8 single-player Steam games similar to Octo Armada, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Octo Armada page.
Ranked picks
- 1
Gravity Slugger
Single-player alternative to Octo Armada — playable solo, no multiplayer required. Shares Action and Indie with Octo Armada.
Gravity Slugger is an arcade-style wave defense game where you use gravity and orbital mechanics to fling projectiles at attacking enemy spaceships. Dodge enemies, gather salvage, and upgrade your skills with chaotic and deadly abilities in this physics-based 2D game.
- 2
Shoot Some Rocks
Single-player alternative to Octo Armada — playable solo, no multiplayer required. Shares Action and Indie with Octo Armada.
A bullet hell roguelite about a lonely worker drinking alone in space on Christmas Eve. Survive waves of cosmic chaos, get a cold beer, and face five massive bosses inspired by real space calamities.
- 3
Winnie-the-Pooh Redux: Halloween Survivors
Single-player alternative to Octo Armada — playable solo, no multiplayer required. Shares Action and Indie with Octo Armada.
Heal instead of harm in this wholesome Halloween bullet heaven! Play as 9 magical versions of Pooh, recruit a Ghost Army, collect Candy Corn, upgrade your abilities, and restore peace to the Hundred Acre Wood.
- 4
Mega Raiders
Single-player alternative to Octo Armada — playable solo, no multiplayer required. Shares Action and Indie with Octo Armada.
You know when the screen is just exploding with enemies, you're leveling up like crazy? Yeah, we made that in CO-OP. Grab your squad, build your character, use your ultimate, and enter the boss lairs to slay them. Everything is different when you're wrecking stuff with your crew.
- 5
Shard Squad
Single-player alternative to Octo Armada — playable solo, no multiplayer required. Shares Action and Indie with Octo Armada.
Form a squad of elemental creatures and face hordes of challenging enemies! Choose your Shards according to their synergies to gain new abilities, and equip relics that will make the winds blow in your favor! Survive through different environments and save your lands!
- 6
Galactic Vault
Single-player alternative to Octo Armada — playable solo, no multiplayer required. Shares Action and Indie with Octo Armada.
Build your weapon to its full potential in Galactic Vault, a fast-paced FPS roguelite. Discover endless upgrade combinations, craft diverse builds, and unleash devastating abilities. Get ready to infiltrate high-security vaults and recover lost tech.
- 7
Boom Buddies
Single-player alternative to Octo Armada — playable solo, no multiplayer required. Shares Action and Indie with Octo Armada.
Boom Buddies is a fixed-position bullet hell survival game where animal heroes face endless enemy waves, upgrade weapons through card choices, unlock new characters, and compete on global leaderboards.
- 8
Megabonk
Single-player alternative to Octo Armada — playable solo, no multiplayer required. Shares Action and Indie with Octo Armada.
Smash your way through endless waves of enemies and grow absurdly powerful! Grab loot, level up, unlock characters and upgrade to create unique and crazy builds as you fend off hordes of creatures!