Games like Voiceless
Games like Voiceless include No, I'm not a Human, Late Shift, She Sees Red - Interactive Movie, The Test, and Breakout 13. We matched them by the tags players give Voiceless on Steam (Indie, FMV, Choose Your Own Adventure, Multiple Endings, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

No, I'm not a Human
Shared: Indie · Horror · Psychological Horror

Late Shift
Shared: FMV · Choose Your Own Adventure · Multiple Endings

She Sees Red - Interactive Movie
Shared: FMV · Indie · Multiple Endings

The Test
Shared: Choose Your Own Adventure · Multiple Endings · Psychological Horror

Breakout 13
Shared: FMV · Choose Your Own Adventure · Multiple Endings

Love Is All Around
Shared: FMV · Multiple Endings · First-Person

The Complex
Shared: FMV · Multiple Endings · Adventure

Erica
Shared: FMV · Choose Your Own Adventure · Female Protagonist

Road to Empress I
Shared: FMV · Female Protagonist · Multiple Endings

Little Misfortune
Shared: Indie · Psychological Horror · Female Protagonist

Slay the Princess — The Pristine Cut
Shared: Choose Your Own Adventure · Psychological Horror · Horror

The Casting of Frank Stone™
Shared: Multiple Endings · Horror · Choices Matter

The Test: Hypothesis Rising
Shared: Multiple Endings · Choose Your Own Adventure · Horror

Homicipher
Shared: Female Protagonist · Horror · Multiple Endings

Outlast
Shared: First-Person · Horror · Psychological Horror

Oxenfree
Shared: Indie · Female Protagonist · Choices Matter

Road 96
Shared: First-Person · Multiple Endings · Choose Your Own Adventure

The Stanley Parable
Shared: Indie · First-Person · Multiple Endings

Poppy Playtime
Shared: Horror · First-Person · Indie

The Quarry
Shared: Multiple Endings · Horror · Choices Matter

The Three Kingdoms: Rebirth
Shared: FMV · Multiple Endings · First-Person

OMORI
Shared: Indie · Psychological Horror · Multiple Endings

Road to Empress Ⅱ
Shared: FMV · Female Protagonist · Choices Matter

Blair Witch
Shared: Indie · Horror · First-Person