Games like Purple Maniac
Games like Purple Maniac include Little Misfortune, Your Turn To Die -Death Game By Majority-, Florence, Fran Bow, and That's not my Neighbor. We matched them by the tags players give Purple Maniac on Steam (Casual, Interactive Fiction, Point & Click, Realistic, and Stylized): closest matches first, and among equally close ones the better-known games.

Little Misfortune
Shared: Point & Click · Psychological Horror · Indie

Your Turn To Die -Death Game By Majority-
Shared: Point & Click · Interactive Fiction · Dark

Florence
Shared: Casual · Interactive Fiction · Indie

Fran Bow
Shared: Point & Click · Psychological Horror · Dark

That's not my Neighbor
Shared: Casual · Point & Click · Indie

Gorogoa
Shared: Casual · Point & Click · Indie

Death and Taxes
Shared: Point & Click · Casual · Interactive Fiction

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

Milk inside a bag of milk inside a bag of milk
Shared: Interactive Fiction · Abstract · Psychological Horror

Late Shift
Shared: Interactive Fiction · Crime · Realistic

There Is No Game: Wrong Dimension
Shared: Point & Click · Casual · Indie

911 Operator
Shared: Casual · Realistic · Crime

Sally Face - Episode One
Shared: Psychological Horror · Dark · Point & Click

Tiny Bunny
Shared: Dark · Interactive Fiction · Psychological Horror

The NOexistenceN of you AND me
Shared: Interactive Fiction · Psychological Horror · Psychological

Ready or Not
Shared: Realistic · Psychological Horror · Crime

Storyteller
Shared: Interactive Fiction · Point & Click · Casual

The Coffin of Andy and Leyley
Shared: Psychological · Psychological Horror · Dark

Milk outside a bag of milk outside a bag of milk
Shared: Psychological Horror · Abstract · Psychological

Erica
Shared: Interactive Fiction · Point & Click · Casual

Insomnia: Theater in the Head
Shared: Point & Click · Stylized · Psychological

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Interactive Fiction · Dark · Multiple Endings

Ken Follett's The Pillars of the Earth
Shared: Point & Click · Interactive Fiction · Casual

and Roger
Shared: Interactive Fiction · Point & Click · Psychological Horror