Games like Guardians: Royal Journey
Games like Guardians: Royal Journey include Bloons TD 6, Plants vs. Zombies GOTY Edition, Kingdom Rush - Tower Defense, Kingdom Rush 5: Alliance TD, and Kingdom Rush Origins - Tower Defense. We matched them by the tags players give Guardians: Royal Journey on Steam (Strategy, Casual, Tower Defense, 2D Platformer, and 2D): 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: Strategy · Tower Defense · Casual

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

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · 2D

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

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

Bloons TD 5
Shared: Strategy · Tower Defense · Casual

Brawlhalla
Shared: Casual · 2D Platformer · Free to Play

Rock 'N' Roll Defense
Shared: Strategy · Tower Defense · Casual

Zup! S
Shared: Casual · 2D · Relaxing

The WereCleaner
Shared: Casual · Strategy · Cute

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

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

Shelldiver
Shared: Casual · 2D · Relaxing

Relic Guardian - Tower Defense
Shared: Strategy · Tower Defense · 2D

ShellShock Live
Shared: Strategy · 2D · Casual

Webbed
Shared: 2D Platformer · Cute · 2D

Zero Stress King: Idle Defense
Shared: Tower Defense · Strategy · Casual

Infinity Nikki
Shared: Casual · Cute · Relaxing

Defend Your Life: TD
Shared: Casual · Strategy · Tower Defense

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

Oriental Dynasty - Silk Road defense war
Shared: Strategy · Tower Defense · Casual

Pikuniku
Shared: Casual · Cute · Indie

Plague Inc: Evolved
Shared: Strategy · Casual · Indie