If you liked this
Games like Abaddon: Princess of the Decay
If you finished Abaddon: Princess of the Decay, the closest matches are The Monstrous Horror Show, 99 Spirits: Cage of Night, 99 Spirits: Weeping Demon's Bell, Off and Dawnfolk. All 36 share its adventure genre and are ranked by how closely their themes and modes overlap.
The Monstrous Horror Show
99 Spirits: Cage of Night
99 Spirits: Weeping Demon's Bell
86
Off
100
Dawnfolk
Deltarune
85
Backpack Hero
80
The Bookwalker: Thief of Tales
95
Ash of Gods: The Way
87
Divinity: Original Sin
86
Thronebreaker: The Witcher Tales
80
Zero Escape: Zero Time Dilemma
78
Sunday Gold
The Coffin of Andy and Leyley
78
Tails Noir
80
Phoenix Wright: Ace Attorney - Dual Destinies
81
Phoenix Wright: Ace Attorney - Spirit of Justice
80
Desta: The Memories Between
82
Roguebook
83
Coromon
83
Faeria
77
Corpse Party
93
Nowhere Prophet
70
Zoeti
75
Death and Taxes
86
Desktop Dungeons
71
Utawarerumono: Prelude to the Fallen
77
Eiyu*Senki - The World Conquest
79
Reverie Knights Tactics
I Was a Teenage Exocolonist
80
Arcadia Fallen
70
Ar tonelico: Melody of Elemia
Upcoming
Dungeon of Departure
Upcoming
Brownie's Adventure: The Final Resolution
Upcoming
Heart Harvest: A Detective Game
63