Games like The Last Scion
Games like The Last Scion include The Life and Suffering of Sir Brante, Suzerain, Roadwarden, Mass Effect™ Legendary Edition, and Aliya: Timelink. We matched them by the tags players give The Last Scion on Steam (RPG, Interactive Fiction, Choose Your Own Adventure, Text-Based, and Aliens): closest matches first, and among equally close ones the better-known games.

The Life and Suffering of Sir Brante
Shared: RPG · Interactive Fiction · Choose Your Own Adventure

Suzerain
Shared: Choose Your Own Adventure · Interactive Fiction · RPG

Roadwarden
Shared: RPG · Text-Based · Interactive Fiction

Mass Effect™ Legendary Edition
Shared: RPG · Space · Choices Matter

Aliya: Timelink
Shared: RPG · Interactive Fiction · Space

Baldur's Gate 3
Shared: RPG · Character Customization · Choices Matter

Choice of Robots
Shared: Choose Your Own Adventure · Interactive Fiction · Text-Based

Undertale
Shared: RPG · Choices Matter · Multiple Endings

The Life and Suffering of Sir Brante — Chapter 1&2
Shared: Interactive Fiction · Choose Your Own Adventure · RPG

Vampire: The Masquerade — Night Road
Shared: Choose Your Own Adventure · Interactive Fiction · Text-Based

Late Shift
Shared: Choose Your Own Adventure · Interactive Fiction · Choices Matter

Starfield
Shared: RPG · Space · Character Customization

Breakout 13
Shared: Interactive Fiction · Choose Your Own Adventure · RPG

Heroes Rise: The Prodigy
Shared: RPG · Choose Your Own Adventure · Text-Based

STAR WARS™ Knights of the Old Republic™ II - The Sith Lords™
Shared: RPG · Choices Matter · Story Rich

Dispatch
Shared: Choices Matter · Superhero · Choose Your Own Adventure

Fallen Hero: Rebirth
Shared: RPG · Text-Based · Choose Your Own Adventure

Citizen Sleeper
Shared: RPG · Interactive Fiction · Text-Based

Dragon Age: Origins - Ultimate Edition
Shared: RPG · Choices Matter · Character Customization

Sorcery! Parts 1 and 2
Shared: RPG · Choose Your Own Adventure · Interactive Fiction

Warhammer 40,000: Rogue Trader
Shared: RPG · Choices Matter · Character Customization

Esoteric Ebb
Shared: RPG · Interactive Fiction · Choices Matter

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Choices Matter · Story Rich

Mass Effect (2007)
Shared: RPG · Space · Choices Matter