Games like Echoes
Games like Echoes include Mirror 2: Project X, Aliya: Timelink, OPUS: Echo of Starsong - Full Bloom Edition, Magical Girl Witch Trials, and STEINS;GATE. We matched them by the tags players give Echoes on Steam (Visual Novel, Sci-fi, Female Protagonist, Space Sim, and Mystery): closest matches first, and among equally close ones the better-known games.

Mirror 2: Project X
Shared: Visual Novel · Female Protagonist · Casual

Aliya: Timelink
Shared: Visual Novel · Sci-fi · Space

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Visual Novel · Female Protagonist · Space

Magical Girl Witch Trials
Shared: Visual Novel · Female Protagonist · Mystery

STEINS;GATE
Shared: Visual Novel · Sci-fi · Multiple Endings

The Cosmic Wheel Sisterhood
Shared: Female Protagonist · Visual Novel · Interactive Fiction

Alien: Isolation
Shared: Sci-fi · Aliens · Female Protagonist

Class of '09
Shared: Visual Novel · Female Protagonist · Casual

Until Then
Shared: Visual Novel · Mystery · 2D

Volcano Princess
Shared: Female Protagonist · Visual Novel · Multiple Endings

Far Away
Shared: Visual Novel · Female Protagonist · Choices Matter

The Invincible
Shared: Sci-fi · Female Protagonist · Mystery

SpaceEngine
Shared: Sci-fi · Casual · Space Sim

Lay a Beauty to Rest: The Darkness Peach Blossom Spring
Shared: Visual Novel · Mystery · Interactive Fiction

AI: The Somnium Files
Shared: Visual Novel · Mystery · Sci-fi

Elite Dangerous
Shared: Space Sim · Sci-fi · Space

Cosmoteer: Starship Architect & Commander
Shared: Sci-fi · Space Sim · Space

Lightracer Spark
Shared: Sci-fi · Visual Novel · Space Sim

Sweet Home
Shared: Visual Novel · Female Protagonist · Interactive Fiction

Class of '09: The Re-Up
Shared: Visual Novel · Female Protagonist · Casual

Danganronpa V3: Killing Harmony
Shared: Visual Novel · Female Protagonist · Mystery

The Fermi Paradox
Shared: Sci-fi · Space Sim · Aliens

Zero Escape: The Nonary Games
Shared: Visual Novel · Mystery · Sci-fi

Analogue: A Hate Story
Shared: Visual Novel · Sci-fi · Female Protagonist