Games like Torreta
Games like Torreta include Bloons TD 6, Plants vs. Zombies GOTY Edition, Rogue Tower, Kingdom Rush - Tower Defense, and Kingdom Rush Origins - Tower Defense. We matched them by the tags players give Torreta on Steam (Tower Defense, Strategy, Top-Down, Singleplayer, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Tower Defense · Strategy · Singleplayer

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · Singleplayer

Rogue Tower
Shared: Tower Defense · Strategy · Roguelike

Kingdom Rush - Tower Defense
Shared: Tower Defense · Strategy · Singleplayer

Kingdom Rush Origins - Tower Defense
Shared: Tower Defense · Strategy · Singleplayer

Plague Inc: Evolved
Shared: Strategy · Singleplayer · Multiplayer

Bloons TD 5
Shared: Tower Defense · Strategy · Multiplayer

Kingdom Rush Frontiers - Tower Defense
Shared: Tower Defense · Strategy · Singleplayer

Mindustry
Shared: Tower Defense · Strategy · Multiplayer

Slay the Spire 2
Shared: Strategy · Roguelike · Multiplayer

Cluckmech Oasis
Shared: Strategy · Tower Defense · Roguelike

Kingdom Rush 5: Alliance TD
Shared: Tower Defense · Strategy · Singleplayer

Prison Architect
Shared: Strategy · Top-Down · Building

Dungeon Defenders
Shared: Tower Defense · Multiplayer · Strategy

ShellShock Live
Shared: Strategy · Multiplayer · 2D

Legion TD 2 - Multiplayer Tower Defense
Shared: Tower Defense · Strategy · Multiplayer

FTL: Faster Than Light
Shared: Strategy · Roguelike · Singleplayer

Balatro
Shared: Strategy · Roguelike · Singleplayer

Kingdom Two Crowns
Shared: Tower Defense · Singleplayer · Strategy

Minimalist Tower Defense
Shared: Tower Defense · Strategy · Top-Down

Buckshot Roulette
Shared: Multiplayer · Strategy · Singleplayer

GemCraft - Chasing Shadows
Shared: Tower Defense · Strategy · Singleplayer

Factorio
Shared: Strategy · Multiplayer · Base Building

Forts
Shared: Strategy · Multiplayer · Base Building