Games like Hill Defender
Games like Hill Defender include Thronefall, Totally Accurate Battle Simulator, Bee Island, Northend Tower Defense, and Orcs Must Die! 3. We matched them by the tags players give Hill Defender on Steam (Action, Strategy, Auto Battler, Tower Defense, and Physics): closest matches first, and among equally close ones the better-known games.

Thronefall
Shared: Strategy · Tower Defense · Action

Totally Accurate Battle Simulator
Shared: Strategy · Physics · Funny

Bee Island
Shared: Strategy · Tower Defense · Action

Northend Tower Defense
Shared: Strategy · Tower Defense · Auto Battler

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

Kingdom Rush 6: Genesis TD
Shared: Strategy · Action · Tower Defense

Age of Darkness: Final Stand
Shared: Tower Defense · Strategy · Action RTS

Creeper World 4
Shared: Tower Defense · Strategy · Real Time Tactics

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

Taur
Shared: Strategy · Action · Tower Defense

DG2: Defense Grid 2
Shared: Strategy · Action · Tower Defense

Forts
Shared: Strategy · Physics · Base Building

Bad North: Jotunn Edition
Shared: Tower Defense · Real Time Tactics · Auto Battler

Warpips
Shared: Strategy · Tower Defense · Auto Battler

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

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

Shieldwall
Shared: Action · Strategy · Simulation

Kingdom Two Crowns
Shared: Tower Defense · Strategy · Base Building

Total Tank Simulator
Shared: Strategy · Action · Physics

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

Bloons TD 6
Shared: Strategy · Tower Defense · 3D

Bloons TD 5
Shared: Strategy · Tower Defense · Action

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

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