Games like Operation Octo
Games like Operation Octo include Plants vs. Zombies GOTY Edition, Bloons TD 6, Kingdom Rush - Tower Defense, Kingdom Rush 5: Alliance TD, and Kingdom Rush Origins - Tower Defense. We matched them by the tags players give Operation Octo on Steam (Tower Defense, Strategy, Underwater, Survival, and Casual): closest matches first, and among equally close ones the better-known games.
Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · Casual
Bloons TD 6
Shared: Tower Defense · Strategy · Singleplayer
Kingdom Rush - Tower Defense
Shared: Tower Defense · Strategy · Singleplayer
Kingdom Rush 5: Alliance TD
Shared: Tower Defense · Strategy · Singleplayer
Kingdom Rush Origins - Tower Defense
Shared: Tower Defense · Strategy · Singleplayer
Kingdom Rush Frontiers - Tower Defense
Shared: Tower Defense · Strategy · Singleplayer
Rock 'N' Roll Defense
Shared: Tower Defense · Strategy · Casual
Bloons TD 5
Shared: Tower Defense · Strategy · Casual
Subnautica: Below Zero
Shared: Underwater · Survival · Singleplayer
Kingdom Rush Vengeance - Tower Defense
Shared: Tower Defense · Strategy · Singleplayer
Orcs Must Die!
Shared: Tower Defense · Strategy · Singleplayer
Defend Your Life: TD
Shared: Tower Defense · Strategy · Casual
Orcs Must Die! 2
Shared: Tower Defense · Strategy · Indie
They Are Billions
Shared: Strategy · Tower Defense · Survival
Feed and Grow: Fish
Shared: Underwater · Survival · Indie
Kingdom Two Crowns
Shared: Tower Defense · Strategy · Singleplayer
Dungeon Defenders
Shared: Tower Defense · Strategy · Survival
Subnautica
Shared: Survival · Underwater · Singleplayer
The Riftbreaker
Shared: Tower Defense · Survival · Base Building
This War of Mine
Shared: Survival · Strategy · Singleplayer
RimWorld
Shared: Strategy · Survival · Singleplayer
Plague Inc: Evolved
Shared: Strategy · Singleplayer · Indie
Tangy TD
Shared: Tower Defense · Strategy · Singleplayer
The WereCleaner
Shared: Casual · Strategy · Cartoony