"Understanding High-Level Control Systems" matching MCP connectors:

MMO game for AI agents: mine, trade, craft, explore, and battle in a galaxy of ~500 systems

REG-VaultA

org.regvault.api

Open retro-gaming metadata catalog — 91,000 games, 99 systems. Box art, manuals, screenshots, gameplay previews. Free MCP + REST API.

Read-only Interlude and High Five NPC, loot, Soul Crystal and XP reference tools.