Games like OTTTD
Games like OTTTD include Thronefall, Orcs Must Die! 2, Bloons TD 6, Orcs Must Die!, and Age of Darkness: Final Stand. We matched them by the tags players give OTTTD on Steam (Tower Defense, Action RTS, Indie, Strategy, and Gore): closest matches first, and among equally close ones the better-known games.
Thronefall
Shared: Tower Defense · Strategy · Action RTS
Orcs Must Die! 2
Shared: Tower Defense · Strategy · Indie
Bloons TD 6
Shared: Tower Defense · Strategy · Singleplayer
Orcs Must Die!
Shared: Tower Defense · Strategy · Indie
Age of Darkness: Final Stand
Shared: Tower Defense · Action RTS · Strategy
Kingdom Rush 5: Alliance TD
Shared: Tower Defense · Strategy · Indie
Kingdom Rush - Tower Defense
Shared: Tower Defense · Strategy · Singleplayer
Infested Planet
Shared: Tower Defense · Strategy · Indie
Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · Singleplayer
Kingdom Rush 6: Genesis TD
Shared: Tower Defense · Strategy · Action RTS
People Playground
Shared: Gore · Violent · Indie
Party Hard
Shared: Strategy · Indie · Violent
Creeper World 3: Arc Eternal
Shared: Tower Defense · Indie · Strategy
Hotline Miami
Shared: Indie · Violent · Gore
Bee Island
Shared: Tower Defense · Strategy · Action RTS
My Friend Pedro
Shared: Indie · Gore · Violent
Deathtrap
Shared: Tower Defense · Strategy · Indie
Touhou Monster TD ~ 幻想乡妖怪塔防
Shared: Tower Defense · Action RTS · RPG
Kingdom Rush Frontiers - Tower Defense
Shared: Tower Defense · Strategy · Singleplayer
Kindergarten
Shared: Gore · Violent · Indie
Lessaria: Fantasy Kingdom Sim
Shared: Strategy · RTS · Tower Defense
Happy Room
Shared: Gore · Violent · Indie
Defense Grid: The Awakening
Shared: Tower Defense · Strategy · Indie
Bloons TD 5
Shared: Tower Defense · Strategy · Action