If you liked this
Games like Opus Castle
If you finished Opus Castle, the closest matches are Star Citizen, Inzoi, Kingdom Come: Deliverance II, Hytale and The Alters. All 36 share its adventure genre and are ranked by how closely their themes and modes overlap.
Star Citizen
90
Inzoi
93
Kingdom Come: Deliverance II
80
Hytale
87
The Alters
87
Cairn
74
No Man's Sky
91
Mewgenics
90
Pokémon Pokopia
95
Satisfactory
100
RoadCraft
92
Abiotic Factor
92
Dave the Diver: In the Jungle
90
Welcome to Elderfield
80
Pathologic 3
80
Escape the Backrooms
82
Skate Story
86
Wanderstop
76
Nivalis Nights
94
Caves of Qud
82
The Hundred Line: Last Defense Academy
89
Nighthawks
88
Yakuza 0: Director's Cut
83
Fantasy Life i: The Girl Who Steals Time
93
Cult of the Lamb: Woolhaven
70
Will: Follow the Light
72
Outbound
80
System Shock
93
Dave the Diver
85
Starsand Island
95
Slay the Princess: The Pristine Cut
86
Paranormasight: The Mermaid's Curse
Free
74
Infinity Nikki
76
Solarpunk
87
Promise Mascot Agency
80