Games like Towerslam
Games like Towerslam include Thronefall, Emberward, Bloons TD 6, Rogue Tower, and Kingdom Rush - Tower Defense. We matched them by the tags players give Towerslam on Steam (Tower Defense, Strategy, Roguelite, Action, and Isometric): closest matches first, and among equally close ones the better-known games.

Thronefall
Shared: Tower Defense · Strategy · Action

Emberward
Shared: Tower Defense · Strategy · Roguelite

Bloons TD 6
Shared: Tower Defense · Strategy · Singleplayer

Rogue Tower
Shared: Tower Defense · Strategy · Roguelite

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

Orcs Must Die! Deathtrap
Shared: Tower Defense · Roguelite · Strategy

Orcs Must Die! 3
Shared: Tower Defense · Strategy · Action

Orcs Must Die!
Shared: Tower Defense · Strategy · Action

Hades
Shared: Roguelite · Action · Singleplayer

Totally Accurate Battle Simulator
Shared: Strategy · Singleplayer · Physics

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Singleplayer · Real Time Tactics

Wall World
Shared: Roguelite · Tower Defense · Strategy

We Who Are About To Die
Shared: Strategy · Roguelite · Action

Balatro
Shared: Strategy · Singleplayer · Roguelite

Yokai Art: Night Parade of One Hundred Demons
Shared: Tower Defense · Roguelite · Strategy

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

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

Heretic's Fork
Shared: Tower Defense · Strategy · Action

Slay the Spire
Shared: Strategy · Roguelite · Singleplayer

Orcs Must Die! 2
Shared: Tower Defense · Strategy · Action

Bloons TD 5
Shared: Tower Defense · Strategy · Action

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

Total War: WARHAMMER III
Shared: Strategy · Real Time Tactics · Action

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