Games like Mercury Abbey
Games like Mercury Abbey include OneShot, Tales of the Black Forest, Firework, There Is No Game: Wrong Dimension, and The Rewinder. We matched them by the tags players give Mercury Abbey on Steam (Pixel Graphics, Puzzle, Singleplayer, Hand-drawn, and 2D): closest matches first, and among equally close ones the better-known games.

OneShot
Shared: Pixel Graphics · Puzzle · Singleplayer

Tales of the Black Forest
Shared: Pixel Graphics · Adventure · Indie

Firework
Shared: Puzzle · 2D · Singleplayer

There Is No Game: Wrong Dimension
Shared: Puzzle · Pixel Graphics · Adventure

The Rewinder
Shared: Pixel Graphics · Puzzle · Singleplayer

Gorogoa
Shared: Puzzle · Hand-drawn · Singleplayer

DISTRAINT: Deluxe Edition
Shared: Pixel Graphics · 2D · Indie

OMORI
Shared: Pixel Graphics · Hand-drawn · Indie

Changed
Shared: Puzzle · Pixel Graphics · Singleplayer

The Witch's House MV
Shared: Pixel Graphics · 2D · Puzzle

Baba Is You
Shared: Puzzle · Singleplayer · Pixel Graphics

DAVE THE DIVER
Shared: Pixel Graphics · Singleplayer · Adventure

Papers, Please
Shared: Pixel Graphics · Singleplayer · Puzzle

CrossCode
Shared: Pixel Graphics · Puzzle · Singleplayer

Sanfu
Shared: Puzzle · 2D · Hand-drawn

FEZ
Shared: Puzzle · Pixel Graphics · Singleplayer

Angels of Death
Shared: Pixel Graphics · Puzzle · 2D

Carto
Shared: Puzzle · Hand-drawn · Indie

The White Door
Shared: Puzzle · Adventure · Detective

To the Moon
Shared: Pixel Graphics · Singleplayer · Indie

Pony Island
Shared: Puzzle · Pixel Graphics · Singleplayer

Impostor Factory
Shared: Pixel Graphics · 2D · Singleplayer

Unpacking
Shared: Pixel Graphics · Puzzle · Singleplayer

Sally Face - Episode One
Shared: Puzzle · Indie · Adventure