Games like Mary New Testament
Games like Mary New Testament include Pseudoregalia, Tomb Raider Game of the Year, Mirror 2: Project X, Kena: Bridge of Spirits, and Resident Evil 3. We matched them by the tags players give Mary New Testament on Steam (3D Platformer, Hidden Object, Adventure, Female Protagonist, and 3D): closest matches first, and among equally close ones the better-known games.

Pseudoregalia
Shared: 3D Platformer · Female Protagonist · 3D

Tomb Raider Game of the Year
Shared: Adventure · Female Protagonist · Third Person

Mirror 2: Project X
Shared: 3D · Female Protagonist · Anime

Kena: Bridge of Spirits
Shared: Adventure · Female Protagonist · 3D Platformer

Resident Evil 3
Shared: Female Protagonist · Horror · Third Person

Rise of the Tomb Raider™
Shared: Adventure · Female Protagonist · Third Person

Alice: Madness Returns
Shared: 3D Platformer · Female Protagonist · Horror

FATAL FRAME II: Crimson Butterfly REMAKE
Shared: Adventure · Female Protagonist · Horror

Sonic Frontiers
Shared: 3D Platformer · Adventure · 3D

DreadOut
Shared: Adventure · Female Protagonist · Horror

Resident Evil 0
Shared: Adventure · Horror · Survival Horror

A Plague Tale: Innocence
Shared: Adventure · Female Protagonist · Third Person

Penny’s Big Breakaway
Shared: 3D Platformer · Adventure · 3D

A Hat in Time
Shared: 3D Platformer · Female Protagonist · Adventure

Five Nights at Freddy's: Security Breach
Shared: Horror · Adventure · Survival Horror

Resident Evil 2
Shared: Horror · Third Person · Survival Horror

Sonic Adventure DX
Shared: 3D Platformer · Adventure · Third Person

Hellblade: Senua's Sacrifice
Shared: Female Protagonist · Adventure · Horror

Resident Evil Requiem
Shared: Horror · Survival Horror · Adventure

The Medium
Shared: Adventure · Female Protagonist · Horror

Ratchet & Clank: Rift Apart
Shared: 3D Platformer · Adventure · Third Person

Stellar Blade™
Shared: Female Protagonist · Third Person · Adventure

Resident Evil Revelations 2
Shared: Horror · Adventure · Female Protagonist

FATAL FRAME / PROJECT ZERO: Maiden of Black Water
Shared: Female Protagonist · Horror · Adventure