Games like Purple Noise Echo
Games like Purple Noise Echo include Stray, Antichamber, Outer Wilds, Shadow Tactics: Blades of the Shogun, and The Talos Principle. We matched them by the tags players give Purple Noise Echo on Steam (Strategy, Tactical, Atmospheric, Puzzle, and Exploration): closest matches first, and among equally close ones the better-known games.

Stray
Shared: Atmospheric · Exploration · Puzzle

Antichamber
Shared: Puzzle · Exploration · Singleplayer

Outer Wilds
Shared: Exploration · Atmospheric · Puzzle

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Tactical · Singleplayer

The Talos Principle
Shared: Puzzle · Atmospheric · Exploration

The Witness
Shared: Puzzle · Exploration · Atmospheric

Moncage
Shared: Puzzle · Atmospheric · Singleplayer

COCOON
Shared: Puzzle · Exploration · Atmospheric

XCOM: Enemy Unknown
Shared: Tactical · Strategy · Sci-fi

Blue Prince
Shared: Puzzle · Exploration · Atmospheric

FAR: Lone Sails
Shared: Atmospheric · Exploration · Puzzle

Desperados III
Shared: Strategy · Tactical · Atmospheric

Rise of the Tomb Raider™
Shared: Exploration · Third Person · Singleplayer

Sid Meier's Civilization®: Beyond Earth™
Shared: Strategy · Sci-fi · Tactical

FTL: Faster Than Light
Shared: Strategy · Singleplayer · Tactical

Tomb Raider Game of the Year
Shared: Third Person · Exploration · Singleplayer

Chants of Sennaar
Shared: Puzzle · Atmospheric · Singleplayer

Manifold Garden
Shared: Puzzle · Exploration · Atmospheric

Warhammer 40,000: Mechanicus
Shared: Strategy · Atmospheric · Tactical

ISLANDERS
Shared: Strategy · Puzzle · Minimalist

Mini Metro
Shared: Strategy · Puzzle · Minimalist

SKALD: Against the Black Priory
Shared: Strategy · Atmospheric · Exploration

Monument Valley
Shared: Puzzle · Strategy · Exploration

Cairn
Shared: Exploration · Atmospheric · Difficult