AgentIndex icon
AgentIndex
Gearboy logo
Gearboy
★ 1.2k
vs
STS2MCP logo
STS2MCP
★ 526

Gearboy vs STS2MCP

Gearboy: Gearboy is a cross-platform Game Boy / Game Boy Color emulator written in C++. It runs on Windows, macOS, Linux, BSD, and RetroArch, and includes an embedded MCP server for debugging and tooling. The emulator supports many cartridge types, accurate LCD emulation, save states, cheats, and a full debugger.; STS2MCP: STS2MCP is an experimental research mod for Slay the Spire 2 that enables AI agents to play the game. It exposes game state and actions via a localhost REST API, with an optional MCP server for Claude Desktop/Claude Code integration. It supports both singleplayer and multiplayer co-op, and has been tested against STS2 v0.99.1.

01

TL;DR

Gearboy logo
GearboyDev Tooling · ★ 1.2k

Playing and testing Game Boy and Game Boy Color games

Read Gearboy full review →
STS2MCP logo
STS2MCPDev Tooling · ★ 526

AI agents autonomously playing Slay the Spire 2

Read STS2MCP full review →
02

Side-by-Side Comparison

Field
Gearboy logoGearboy
STS2MCP logoSTS2MCP
Category
Dev Tooling
Dev Tooling
Stars
★ 1.2k
★ 526
License
GPL-3.0
MIT
Install Command
brew install --cask drhelius/geardome/gearboy
git clone https://github.com/Gennadiyev/STS2MCP.git
Updated
1d ago
2mo ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
bsd, emulation, emulator
agentic-ai, mcp-server, mcp-servers
03

Features

Gearboy logoGearboy
01Accurate LCD controller emulation with correct timings and mid-scanline effects
02Game Boy Color support
03Battery-powered RAM save support and save states
04Game Genie and GameShark cheat support
05Full debugger with disassembler, breakpoints, memory editor, and VRAM viewer
STS2MCP logoSTS2MCP
01Exposes game state and actions via a localhost REST API
02Optional MCP server for Claude Desktop / Claude Code integration
03Supports singleplayer and multiplayer (co-op)
04Automatically starts HTTP server on localhost:15526
05Allows AI agents to fully automate game runs
04

Use Cases

Gearboy logoGearboy
↳Playing and testing Game Boy and Game Boy Color games
↳Debugging and reverse engineering ROMs
↳AI-assisted debugging via MCP server for code analysis and inspection
STS2MCP logoSTS2MCP
↳AI agents autonomously playing Slay the Spire 2
↳Collaborative human-AI co-op runs
↳Benchmarking AI reasoning and decision-making capabilities
FAQ

FAQ

What is the difference between Gearboy and STS2MCP?
Both Gearboy and STS2MCP are in the Dev Tooling category. Gearboy has 1.2k stars, while STS2MCP has 526 stars.
Which is better, Gearboy or STS2MCP?
The best choice depends on your use case. Choose Gearboy if Playing and testing Game Boy and Game Boy Color games, and STS2MCP if AI agents autonomously playing Slay the Spire 2.
Is Gearboy free or open source?
Yes, Gearboy is open source on GitHub (GPL-3.0).
Is STS2MCP free or open source?
Yes, STS2MCP is open source on GitHub (MIT).
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Related

Alternatives to Gearboy →Alternatives to STS2MCP →Gearboy details →STS2MCP details →