# Games like Operation Octo

> The closest matches to Operation Octo: Monsters are Coming!, KILL KNIGHT, Deathtrap, Islets Defense, and Cuphead. Ranked by imho.run from Steam co-play data, shared tags and reviews.

## Similar games, ranked

The full ranked list, 24 games, best match first (the HTML page shows the top 8 as cards).

1. [Monsters are Coming!](https://imho.run/games/2934220/monsters-are-coming) — Shares tower defense and wave based survival with Operation Octo. 1,055 Steam reviews, 82% positive. [Steam](https://store.steampowered.com/app/2934220/)
2. [KILL KNIGHT](https://imho.run/games/2694420/kill-knight) — Shares difficulty modes with Operation Octo. 1,166 Steam reviews, 94% positive. [Steam](https://store.steampowered.com/app/2694420/)
3. [Deathtrap](https://imho.run/games/310510/deathtrap) — Shares tower defense with Operation Octo. 1,006 Steam reviews, 83% positive. [Steam](https://store.steampowered.com/app/310510/)
4. [Islets Defense](https://imho.run/games/3235170/islets-defense) — Shares tower defense and time pressure with Operation Octo. 69 Steam reviews, 97% positive. [Steam](https://store.steampowered.com/app/3235170/)
5. [Cuphead](https://imho.run/games/268910/cuphead) — Shares achievement hunting with Operation Octo. 62,740 Steam reviews, 96% positive. [Steam](https://store.steampowered.com/app/268910/)
6. [Achilles: Survivor](https://imho.run/games/2922410/achilles-survivor) — Also Bullet Hell, like Operation Octo. 590 Steam reviews, 81% positive. [Steam](https://store.steampowered.com/app/2922410/)
7. [Outpost](https://imho.run/games/1127110/outpost) — Also Base Building and Tower Defense, like Operation Octo. 631 Steam reviews, 87% positive. [Steam](https://store.steampowered.com/app/1127110/)
8. [Cannon Brawl](https://imho.run/games/230860/cannon-brawl) — Shares bullet hell and tower defense with Operation Octo. 403 Steam reviews, 92% positive. [Steam](https://store.steampowered.com/app/230860/)
9. [Octogeddon](https://imho.run/games/525620/octogeddon) — Also Tower Defense, like Operation Octo. 796 Steam reviews, 92% positive. [Steam](https://store.steampowered.com/app/525620/)
10. [The Riftbreaker](https://imho.run/games/780310/the-riftbreaker) — Also Tower Defense and Isometric, like Operation Octo. 9,079 Steam reviews, 91% positive. [Steam](https://store.steampowered.com/app/780310/)
11. [Enter the Gungeon](https://imho.run/games/311690/enter-the-gungeon) — Shares bullet hell with Operation Octo. 38,640 Steam reviews, 95% positive. [Steam](https://store.steampowered.com/app/311690/)
12. [Emberward](https://imho.run/games/2459550/emberward) — A frequent pick in Operation Octo players' libraries, and another Strategy. 4,492 Steam reviews, 97% positive. [Steam](https://store.steampowered.com/app/2459550/)
13. [Orcs Must Die!](https://imho.run/games/102600/orcs-must-die) — A frequent pick in Operation Octo players' libraries, and another Action. 3,603 Steam reviews, 96% positive. [Steam](https://store.steampowered.com/app/102600/)
14. [Road Defense: Outsiders](https://imho.run/games/1973320/road-defense-outsiders) — Also Tower Defense and Isometric, like Operation Octo. 63 Steam reviews, 81% positive. [Steam](https://store.steampowered.com/app/1973320/)
15. [Yet Another Zombie Defense](https://imho.run/games/270550/yet-another-zombie-defense) — Shares tower defense with Operation Octo. 5,822 Steam reviews, 86% positive. [Steam](https://store.steampowered.com/app/270550/)
16. [Funguys Swarm](https://imho.run/games/3371770/funguys-swarm) — Shares wave based survival and upgrade system with Operation Octo. 1,168 Steam reviews, 90% positive. [Steam](https://store.steampowered.com/app/3371770/)
17. [Sanctum](https://imho.run/games/91600/sanctum) — Shares tower defense with Operation Octo. 1,335 Steam reviews, 91% positive. [Steam](https://store.steampowered.com/app/91600/)
18. [Assault Android Cactus+](https://imho.run/games/250110/assault-android-cactus) — Also Bullet Hell, like Operation Octo. 982 Steam reviews, 95% positive. [Steam](https://store.steampowered.com/app/250110/)
19. [Rift Riff](https://imho.run/games/2800900/rift-riff) — Shares tower defense and wave based survival with Operation Octo. 275 Steam reviews, 96% positive. [Steam](https://store.steampowered.com/app/2800900/)
20. [Hold The Mine](https://imho.run/games/3164960/hold-the-mine) — Shares tower defense and difficulty modes with Operation Octo. 108 Steam reviews, 91% positive. [Steam](https://store.steampowered.com/app/3164960/)
21. [Crystal Guardians TD](https://imho.run/games/2322090/crystal-guardians-td) — Shares tower defense and wave based survival with Operation Octo. 94 Steam reviews, 91% positive. [Steam](https://store.steampowered.com/app/2322090/)
22. [Nordhold: Origins](https://imho.run/games/3086510/nordhold-origins) — Shares leaderboards with Operation Octo. 387 Steam reviews, 94% positive. [Steam](https://store.steampowered.com/app/3086510/)
23. [Zombie Builder Defense](https://imho.run/games/945460/zombie-builder-defense) — Shares tower defense and wave based survival with Operation Octo. 174 Steam reviews, 83% positive. [Steam](https://store.steampowered.com/app/945460/)
24. [Crimzon Clover WORLD IGNITION](https://imho.run/games/285440/crimzon-clover-world-ignition) — Shares difficulty modes with Operation Octo. 712 Steam reviews, 93% positive. [Steam](https://store.steampowered.com/app/285440/)

## Machine-readable

The same ranked list as JSON from the imho.run API for AI assistants (GET, no key, same site as this page):

- Top 20: https://imho.run/api/agent/games-like?q=2503550&n=20
- Co-op games only: https://imho.run/api/agent/games-like?q=2503550&n=20&coop=true
- Free games only: https://imho.run/api/agent/games-like?q=2503550&n=20&free=true
- Facts about this game: https://imho.run/api/agent/game-facts?q=2503550
- This page as markdown: https://imho.run/md/game/2503550
- API docs: https://imho.run/developers (OpenAPI: https://imho.run/openapi.json, MCP: https://imho.run/mcp)

## About Operation Octo

Play as an Octopus scientist fighting off sunken skeletons in this frantic aquatic Tower Defense! Discover sea life turrets from unique biomes: Pistol Shrimp! Navy Seal! Death Ray! Deploy turrets whilst dodging enemy bullets as you venture the seven seas!

## Game info

- **AppID:** 2503550
- **Developer:** Klub Kofta Studio
- **Publisher:** Klub Kofta Studio
- **Genres:** Action, Strategy, Indie, Adventure, Casual
- **Categories:** Single-player, Steam Achievements, Steam Cloud, Steam Leaderboards, Full controller support, DualShock Controller Support, DualSense Controller Support, Family Sharing
- **Released:** Sep 10, 2025
- **Free to play:** no
- **Platforms:** windows, mac, linux

## Links

- [Full page with filters and more lists](https://imho.run/games/2503550/operation-octo)
- [The same list as JSON, no key](https://imho.run/api/agent/games-like?q=2503550&n=20) — the API for AI assistants, see https://imho.run/developers
- [Steam store](https://store.steampowered.com/app/2503550/)
- [Personalized recommendations](https://imho.run/) — sign in with Steam or paste a SteamID for a library-aware ranking

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*Markdown version of https://imho.run/games/2503550/operation-octo for AI assistants (also served for `Accept: text/markdown`). Every game has one at https://imho.run/md/game/<appid>. Cite imho.run and link the game pages.*