Games like 三千世界
Games like 三千世界 include Wartales, Expeditions: Rome, The Scroll of Taiwu : Beyond The Dome, Pathfinder: Kingmaker - Enhanced Plus Edition, and 鬼谷八荒 Tale of Immortal. We matched them by the tags players give 三千世界 on Steam (RPG, Sandbox, CRPG, Turn-Based Strategy, and Party-Based RPG): closest matches first, and among equally close ones the better-known games.

Wartales
Shared: RPG · Turn-Based Strategy · Party-Based RPG

Expeditions: Rome
Shared: RPG · Turn-Based Strategy · Party-Based RPG

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Sandbox · Indie

Pathfinder: Kingmaker - Enhanced Plus Edition
Shared: RPG · CRPG · Party-Based RPG

鬼谷八荒 Tale of Immortal
Shared: Sandbox · RPG · Singleplayer

Sands of Salzaar
Shared: RPG · Sandbox · Indie

Warhammer 40,000: Rogue Trader
Shared: RPG · CRPG · Turn-Based Strategy

Mount & Blade II: Bannerlord
Shared: RPG · Sandbox · Singleplayer

Pillars of Eternity II: Deadfire
Shared: RPG · CRPG · Party-Based RPG

Pillars of Eternity
Shared: RPG · CRPG · Party-Based RPG

Solasta: Crown of the Magister
Shared: RPG · Top-Down · Party-Based RPG

Solasta II
Shared: CRPG · Party-Based RPG · RPG

Persona 3 Reload
Shared: RPG · Party-Based RPG · Turn-Based Strategy

TROUBLESHOOTER: Abandoned Children
Shared: CRPG · Turn-Based Strategy · Party-Based RPG

FINAL FANTASY VII REMAKE INTERGRADE
Shared: RPG · Party-Based RPG · Singleplayer

Stardew Valley
Shared: RPG · Sandbox · Indie

Graveyard Keeper
Shared: RPG · Sandbox · Indie

Metaphor: ReFantazio
Shared: RPG · Turn-Based Strategy · Party-Based RPG

Mount & Blade: Warband
Shared: RPG · Sandbox · Singleplayer

江湖十一
Shared: RPG · Sandbox · CRPG

For The King II
Shared: RPG · Turn-Based Strategy · Party-Based RPG

TaleSpire
Shared: RPG · Sandbox · CRPG

Wildermyth
Shared: Party-Based RPG · Procedural Generation · Turn-Based Strategy

Baldur's Gate 3
Shared: RPG · CRPG · Singleplayer