Games like Guard Her
Games like Guard Her include Bloons TD 6, Plants vs. Zombies GOTY Edition, Rogue Tower, Age of Empires III: Definitive Edition, and Outpost: Infinity Siege. We matched them by the tags players give Guard Her on Steam (Casual, Strategy, Tower Defense, 3D, and Military): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

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

Rogue Tower
Shared: Strategy · Tower Defense · Casual

Age of Empires III: Definitive Edition
Shared: Strategy · Base Building · Military

Outpost: Infinity Siege
Shared: Tower Defense · 3D · Base Building

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

Thronefall
Shared: Strategy · Tower Defense · Base Building

Emberward
Shared: Tower Defense · Strategy · 3D

World of Warships
Shared: Free to Play · 3D · Strategy

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Tower Defense · Casual

Tempest Rising
Shared: Strategy · Base Building · 3D

Bloons TD 5
Shared: Strategy · Tower Defense · Casual

The WereCleaner
Shared: Casual · Strategy · Singleplayer

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

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

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

Tower Dominion
Shared: Strategy · Tower Defense · Base Building

Age of Mythology: Retold
Shared: Strategy · 3D · Base Building

Bee Island
Shared: Strategy · Tower Defense · Base Building

Age of Darkness: Final Stand
Shared: Tower Defense · Strategy · Base Building

Marvel Rivals
Shared: Free to Play · Casual · 3D

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

Idle Champions of the Forgotten Realms
Shared: Strategy · Free to Play · Casual

Mindustry
Shared: Tower Defense · Strategy · Base Building