Games like AGON - The Mysterious Codex (Trilogy)
Games like AGON - The Mysterious Codex (Trilogy) include Chants of Sennaar, The Room, There Is No Game: Wrong Dimension, The Room 4: Old Sins, and The Room Three. We matched them by the tags players give AGON - The Mysterious Codex (Trilogy) on Steam (Adventure, Point & Click, and Puzzle): closest matches first, and among equally close ones the better-known games.

Chants of Sennaar
Shared: Adventure · Puzzle · Point & Click

The Room
Shared: Puzzle · Point & Click · Adventure

There Is No Game: Wrong Dimension
Shared: Point & Click · Puzzle · Adventure

The Room 4: Old Sins
Shared: Puzzle · Point & Click · Adventure

The Room Three
Shared: Adventure · Puzzle · Point & Click

Deponia
Shared: Adventure · Point & Click · Puzzle

The Room Two
Shared: Puzzle · Point & Click · Adventure

Servant of the Lake
Shared: Adventure · Puzzle · Point & Click

Return to Monkey Island
Shared: Adventure · Point & Click · Puzzle

Fran Bow
Shared: Point & Click · Puzzle · Adventure

The Mr. Rabbit Magic Show
Shared: Adventure · Point & Click · Puzzle

Rusty Lake Paradise
Shared: Point & Click · Puzzle · Adventure

Machinarium
Shared: Point & Click · Puzzle · Adventure

Storyteller
Shared: Point & Click · Puzzle · Adventure

Samsara Room
Shared: Adventure · Puzzle · Point & Click

Endacopia
Shared: Adventure · Point & Click · Puzzle

Underground Blossom
Shared: Adventure · Puzzle · Point & Click

The White Door
Shared: Adventure · Puzzle · Point & Click

Syberia
Shared: Adventure · Point & Click · Puzzle

Syberia: The World Before
Shared: Adventure · Point & Click · Puzzle

Grim Fandango Remastered
Shared: Adventure · Point & Click · Puzzle

Deponia: The Complete Journey
Shared: Adventure · Point & Click · Puzzle

The Silent Age
Shared: Point & Click · Adventure · Puzzle

Syberia 3
Shared: Adventure · Puzzle · Point & Click