Games like Earth Defenders
Games like Earth Defenders include Creeper World 4, ShellShock Live, Company of Heroes 3, Broken Arrow, and WARNO. We matched them by the tags players give Earth Defenders on Steam (2D, RTS, Action RTS, Building, and Wargame): closest matches first, and among equally close ones the better-known games.

Creeper World 4
Shared: RTS · Building · Wargame

ShellShock Live
Shared: 2D · Tanks · Action

Company of Heroes 3
Shared: RTS · Wargame · Action RTS

Broken Arrow
Shared: RTS · Wargame · Action RTS

WARNO
Shared: RTS · Wargame · Real Time Tactics

Attack on Toys
Shared: Action RTS · RTS · Real Time Tactics

Terraria
Shared: 2D · Building · Pixel Graphics

Ultimate Epic Battle Simulator 2
Shared: RTS · Action · Wargame

Stronghold: Definitive Edition
Shared: RTS · Building · City Builder

Sudden Strike 4
Shared: RTS · Action RTS · Real Time Tactics

Tooth and Tail
Shared: RTS · 2D · Action

ZeroSpace
Shared: Action RTS · RTS · Wargame

Warhammer Age of Sigmar: Realms of Ruin
Shared: RTS · Action RTS · Action

Age of History 3
Shared: RTS · Wargame · 2D

9-Bit Armies: A Bit Too Far
Shared: RTS · Action RTS · Wargame

Medieval Kingdom Wars
Shared: RTS · Action RTS · Wargame

Door Kickers
Shared: 2D · Action · Top-Down

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

Reassembly
Shared: Building · 2D · Action

Ancient Wars: Sparta Definitive Edition
Shared: RTS · Action RTS · Wargame

Prison Architect
Shared: Building · 2D · Top-Down

Total War: ROME REMASTERED
Shared: RTS · Action · Wargame

Thronefall
Shared: Action RTS · Action · Building

King Arthur's Gold
Shared: 2D · Building · Action