Games like Rules for Thee
Games like Rules for Thee include Undertale, Detroit: Become Human, The Wolf Among Us, Legend of Mortal, and Back to the Dawn. We matched them by the tags players give Rules for Thee on Steam (Choices Matter, Multiple Endings, Investigation, Story Rich, and Lore-Rich): closest matches first, and among equally close ones the better-known games.

Undertale
Shared: Choices Matter · Multiple Endings · Story Rich

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

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

Legend of Mortal
Shared: Choices Matter · Multiple Endings · Lore-Rich

Back to the Dawn
Shared: Choices Matter · Story Rich · Multiple Endings

Death and Taxes
Shared: Choices Matter · Story Rich · Multiple Endings

Dispatch
Shared: Choices Matter · Story Rich · Singleplayer

Beholder
Shared: Choices Matter · Story Rich · Multiple Endings

Cyber Manhunt 2: New World - The Hacking Simulator
Shared: Investigation · Detective · Story Rich

Volcano Princess
Shared: Multiple Endings · Choices Matter · Story Rich

Heavy Rain
Shared: Choices Matter · Multiple Endings · Story Rich

OneShot
Shared: Story Rich · Choices Matter · Multiple Endings

Disco Elysium - The Final Cut
Shared: Choices Matter · Story Rich · Detective

Beholder Conductor
Shared: Choices Matter · Story Rich · Singleplayer

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

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

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

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

Beholder 2
Shared: Choices Matter · Story Rich · Multiple Endings

Murders on the Yangtze River
Shared: Story Rich · Detective · Investigation

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

Orwell: Keeping an Eye On You
Shared: Investigation · Choices Matter · Story Rich

The Case of the Golden Idol
Shared: Investigation · Detective · Story Rich

Strange Horticulture
Shared: Investigation · Detective · Puzzle