Games like 3D PUZZLE - Harbor
Games like 3D PUZZLE - Harbor include Notes of Soul, Plebby Quest: The Crusades, SMITE 2, UFO 50, and Caster. We matched them by the tags players give 3D PUZZLE - Harbor on Steam (Action, Adventure, Casual, Racing, and RPG): closest matches first, and among equally close ones the better-known games.

Notes of Soul
Shared: Action · Adventure · RPG

Plebby Quest: The Crusades
Shared: Casual · Adventure · Action

SMITE 2
Shared: Action · Adventure · Strategy

UFO 50
Shared: Action · Adventure · RPG

Caster
Shared: Action · Adventure · Casual

Need for Speed™ Heat
Shared: Racing · Action · Adventure

Juicy Realm
Shared: Action · Adventure · Casual

Need for Speed™ Unbound
Shared: Racing · Action · Casual

Dead Age
Shared: RPG · Adventure · Casual

Mount & Blade II: Bannerlord
Shared: RPG · Strategy · Action

Mount & Blade: Warband
Shared: RPG · Action · Strategy

Rogue Legacy 2
Shared: Action · Adventure · Arcade

Disney Speedstorm
Shared: Action · Racing · Casual

Marvel Rivals
Shared: Action · Adventure · Casual

Cat Quest
Shared: Adventure · Action · RPG

Han Xiongnu Wars
Shared: Action · Adventure · RPG

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Adventure · Action · Casual

Home Behind
Shared: Adventure · RPG · Casual

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Adventure · Strategy

Rock of Ages 3: Make & Break
Shared: Action · Strategy · Racing

G2 Fighter / 基因特工
Shared: Adventure · Action · RPG

Swords and Sandals Classic Collection
Shared: Action · RPG · Strategy

Idle Champions of the Forgotten Realms
Shared: Adventure · Strategy · Action

ATLYSS
Shared: RPG · Adventure · Action