About ROBOT BASEBALL
ROBOT BASEBALL (English title: MECHA LEAGUE), a name that plays on "two outs in the bottom of the ninth," is a baseball club management simulation you can play right in your browser. In a fictional robot baseball league of 10 clubs set across the Solar System, you become the Operator and System Director: you discover and develop units, call the shots in games, and run the club's finances and facilities while building a history that spans decades. It's free to play, with nothing to install and no sign-up.
The setting is a fully colonized Solar System. Each world, such as Mars, Europa, Venus and Titan, has a ballpark built by a parent company, and everyone is a robot: not just the units (players) on the field, but also the Operator (manager), the System Director (GM), the owner (the parent company's management AI) and even the fan units in the stands. Clubs run on credits (CR), and units are paid in operating power (kW·season).
All clubs, units and leagues in the game are fictional. No real club names, player names or logos are used.
What you do
- Run the squad — Set the 28-unit Majors roster, the batting order and defensive positions, the starting rotation and bullpen roles yourself. You can even assign a specific starter for a given date.
- Call the game — Watch games live and call pinch hitters, pitching changes, steals, bunts, squeezes and hit-and-runs. Choose between a 2D field view, 3D, or a 4D broadcast with unit animations and camera work.
- Recruit and sign — Send scouts to find prototypes, and strengthen your squad through the Prototype Draft, Free Agency, trades and imported-unit contracts. Every decision has to fit within Power Allocation negotiations and your budget limit.
- Develop — Grow your units with individual training focuses and new pitch development. Behavior OS, tuning and malfunctions also affect upgrades.
- Run the club — Manage ticket prices, facility investment, sponsors and the coaching staff, and keep the trust of the owner AI and your fan units.
- A living league — The other 9 clubs recruit, trade, replace Operators and rebuild on their own. Every unit builds up rivalries and a service story, and retired units may become Maintenance Engineers or commentary AIs, or even run a baseball academy.
- History — Your club chronicle, retired numbers, the Hall of Fame, league records, season documentaries and highlight cards are all kept.
How a season flows
The cycle goes: 144-game Regular Season → Postseason (Wild Card → Semi-Playoff → Playoff → Space Series) → awards, retirements and upgrades → Power Allocation negotiations → Prototype Draft → Free Agency → Opening Day of the new season. If you skip the Offseason, the auto System Director feature handles re-signing key units and filling out the roster for you.
Getting started
- On the New Game screen, choose your Operator call sign and pick a club. You can start by taking over as Operator of an existing club, buying a club, or founding an expansion club.
- Choose your home world, club name (an animal) and club colors.
- If you like, pick a Challenge mode (Worst to First, Low-Budget Operation and more).
- Advance the calendar with the advance button on the Home screen, and make decisions in the Inbox when tasks come up. Detailed league rules are in the in-game 📖 Rules menu.
System explanations and strategy tips are collected in the Strategy Guide. If you're new, start with Getting Started.
About saving
Game data is stored only in this browser (IndexedDB) and is never sent to a server. If you clear the browser's site data or move to another device or browser, your save won't be there. Back up with Settings → Export to JSON file, then import the same file on the new device to pick up where you left off.
Contact
Bug reports and feedback: Coming soon