Games like Monster Castle
Games like Monster Castle include Banana, Dota 2, The Sims™ 4, Yu-Gi-Oh! Master Duel, and SMITE®. We matched them by the tags players give Monster Castle on Steam (Free to Play, Casual, Strategy, and Simulation): closest matches first, and among equally close ones the better-known games.

Banana
Shared: Free to Play · Casual · Simulation

Dota 2
Shared: Free to Play · Strategy · Free To Play

The Sims™ 4
Shared: Free to Play · Simulation · Casual

Yu-Gi-Oh! Master Duel
Shared: Free to Play · Strategy · Simulation

SMITE®
Shared: Free to Play · Strategy · Simulation

Mini Motorways
Shared: Strategy · Casual · Simulation

BidKing
Shared: Casual · Strategy · Simulation

War Thunder
Shared: Free to Play · Simulation · Free To Play

Plague Inc: Evolved
Shared: Strategy · Simulation · Casual

Where Winds Meet
Shared: Free to Play · Casual · Strategy

Game Dev Tycoon
Shared: Simulation · Strategy · Casual

VRChat
Shared: Free to Play · Casual · Simulation

One-armed robber
Shared: Free to Play · Simulation · Strategy

Brawlhalla
Shared: Free to Play · Casual · Free To Play

Marvel Rivals
Shared: Free to Play · Casual · Strategy

Two Point Museum
Shared: Casual · Simulation · Strategy

Bongo Cat
Shared: Free to Play · Casual · Simulation

Idle Champions of the Forgotten Realms
Shared: Free to Play · Strategy · Casual

Pixel Puzzles: Japan
Shared: Casual · Simulation · Free to Play

Cities: Skylines
Shared: Simulation · Strategy · Casual

Nodebuster
Shared: Casual · Strategy · Simulation

Fishing Planet
Shared: Free to Play · Simulation · Casual

911 Operator
Shared: Strategy · Simulation · Casual

Once Human
Shared: Free to Play · Strategy · Simulation