Games like _OUR_:_Defense 2021
Games like _OUR_:_Defense 2021 include Shadow Tactics: Blades of the Shogun, Plants vs. Zombies GOTY Edition, Kingdom Rush - Tower Defense, Aliens: Dark Descent, and Total War: WARHAMMER III. We matched them by the tags players give _OUR_:_Defense 2021 on Steam (Strategy, Tower Defense, RTS, Isometric, and Tactical): closest matches first, and among equally close ones the better-known games.

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

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · 2D

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

Aliens: Dark Descent
Shared: Strategy · RTS · Tactical

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

Starship Troopers: Terran Command
Shared: Strategy · RTS · Tactical

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

Desperados III
Shared: Strategy · Real Time Tactics · Tactical

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Tower Defense · 2D

Wargame: Red Dragon
Shared: Strategy · RTS · Tactical

Infested Planet
Shared: Strategy · Tower Defense · RTS

Men of War: Assault Squad 2
Shared: Strategy · RTS · Tactical

Stronghold: Definitive Edition
Shared: Strategy · RTS · Real Time Tactics

Shadow Tactics: Aiko's Choice
Shared: Strategy · Isometric · Real Time Tactics

Company of Heroes 2
Shared: Strategy · RTS · Tactical

Total War: THREE KINGDOMS
Shared: Strategy · RTS · Tactical

War Mongrels
Shared: Strategy · RTS · Real Time Tactics

Broken Arrow
Shared: Strategy · RTS · Real Time Tactics

Tower Dominion
Shared: Strategy · Tower Defense · RTS

Taur
Shared: Strategy · Tower Defense · RTS

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

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

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

Syrian Warfare
Shared: RTS · Real Time Tactics · Strategy

