Games like Trolley Dilemma
Games like Trolley Dilemma include Undertale, The Stanley Parable, Detroit: Become Human, Beholder, and The Henry Stickmin Collection. We matched them by the tags players give Trolley Dilemma on Steam (Choices Matter, Multiple Endings, Dark Humor, Philosophical, and Satire): closest matches first, and among equally close ones the better-known games.

Undertale
Shared: Choices Matter · Multiple Endings · Story Rich

The Stanley Parable
Shared: Comedy · Satire · Multiple Endings

Detroit: Become Human
Shared: Choices Matter · Multiple Endings · Story Rich

Beholder
Shared: Choices Matter · Dystopian · Multiple Endings

The Henry Stickmin Collection
Shared: Multiple Endings · Choices Matter · Comedy

The Coffin of Andy and Leyley
Shared: Multiple Endings · Choices Matter · Story Rich

Fever Meme
Shared: Multiple Endings · Choices Matter · Comedy

Dispatch
Shared: Choices Matter · Story Rich · Comedy

OneShot
Shared: Story Rich · Choices Matter · Multiple Endings

South Park™: The Stick of Truth™
Shared: Dark Humor · Comedy · Satire

The Wolf Among Us
Shared: Multiple Endings · Choices Matter · Story Rich

Do Not Feed the Monkeys
Shared: Choices Matter · Dark Humor · Multiple Endings

No, I'm not a Human
Shared: Choices Matter · Multiple Endings · Story Rich

The Test
Shared: Multiple Endings · Story Rich · Choices Matter

Road 96
Shared: Choices Matter · Multiple Endings · Story Rich

Tales from the Borderlands
Shared: Choices Matter · Story Rich · Comedy

Reventure
Shared: Multiple Endings · Dark Humor · Comedy

Beholder 2
Shared: Choices Matter · Dystopian · Multiple Endings

LoveChoice
Shared: Choices Matter · Multiple Endings · Story Rich

Night in the Woods
Shared: Dark Humor · Story Rich · Choices Matter

Papers, Please
Shared: Multiple Endings · Dystopian · Story Rich

Minds Beneath Us
Shared: Choices Matter · Story Rich · Dystopian

Emily is Away <3
Shared: Choices Matter · Multiple Endings · Story Rich

LISA: The Painful
Shared: Dark Humor · Choices Matter · Story Rich