Games like JusTD
Games like JusTD include Rogue Tower, Outpost: Infinity Siege, Bloons TD 6, Plants vs. Zombies GOTY Edition, and Dungeon of the ENDLESS™. We matched them by the tags players give JusTD on Steam (Strategy, Casual, Tower Defense, Combat, and Indie): closest matches first, and among equally close ones the better-known games.

Rogue Tower
Shared: Strategy · Tower Defense · Casual

Outpost: Infinity Siege
Shared: Tower Defense · Robots · Base Building

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

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

Dungeon of the ENDLESS™
Shared: Strategy · Tower Defense · Roguelike

Mini Motorways
Shared: Strategy · Casual · Indie

Taur
Shared: Strategy · Tower Defense · Indie

Oxygen Not Included
Shared: Base Building · Strategy · Resource Management

Factorio
Shared: Strategy · Base Building · Resource Management

The King is Watching
Shared: Tower Defense · Strategy · Roguelike

DG2: Defense Grid 2
Shared: Strategy · Tower Defense · Sci-fi

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

Mindustry
Shared: Tower Defense · Strategy · Base Building

Dome Keeper
Shared: Combat · Tower Defense · Roguelike

Tower Dominion
Shared: Strategy · Tower Defense · Roguelike

Creeper World 3: Arc Eternal
Shared: Strategy · Tower Defense · Indie

Dyson Sphere Program
Shared: Base Building · Sci-fi · Strategy

Game Dev Tycoon
Shared: Strategy · Casual · Indie

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

Minimalist Tower Defense
Shared: Strategy · Tower Defense · Casual

RimWorld
Shared: Strategy · Base Building · Sci-fi

They Are Billions
Shared: Strategy · Tower Defense · Base Building

Thronefall
Shared: Strategy · Tower Defense · Base Building

Cliff Empire
Shared: Strategy · Sci-fi · Tower Defense