Install OpenClaw Game Server with Telegram Integration

Introduction

OpenClaw is an open-source reverse-engineering project that recreates the classic platformer game "Claw" using modern technology. This tutorial will guide you through the complete installation process and show you how to set up Telegram integration for notifications and remote management. Whether you're a retro gaming enthusiast or a developer interested in game preservation projects, this guide provides everything you need to get started.

Learning Objectives

By completing this tutorial, you will:

• Understand the OpenClaw project architecture and its dependencies
• Install and configure OpenClaw on a Linux-based hosting environment
• Set up a Telegram bot for remote interaction with your OpenClaw instance
• Configure environment variables and system requirements properly
• Troubleshoot common installation issues
• Apply security best practices for hosting game servers

Prerequisites

Technical Requirements

• A Linux-based VPS or hosting account (Ubuntu 20.04+ or Debian 11+ recommended)
• SSH access to your server with sudo privileges
• At least 2GB RAM and 10GB storage space
• Basic command-line familiarity
• A Telegram account for bot integration

Required Software

• Git (version 2.20+)
• CMake (version 3.10+)
• GCC/G++ compiler (version 7.0+)
• SDL2 development libraries
• libpng and zlib development packages

Knowledge Prerequisites

You should be comfortable with basic Linux commands, file navigation, and text editing. Understanding of makefiles and compilation processes is helpful but not required—this tutorial explains each step in detail.

Step-by-Step Installation Guide

Step 1: Prepare Your Server Environment

First, connect to your server via SSH and update your package repositories:

sudo apt update && sudo apt upgrade -y

Install the required build tools and dependencies:

sudo apt install -y build-essential git cmake libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libsdl2-ttf-dev libpng-dev zlib1g-dev

These packages provide the compilation environment and multimedia libraries that OpenClaw needs to render graphics, play audio, and handle game logic.

Step 2: Clone the OpenClaw Repository

Navigate to your preferred installation directory and clone the OpenClaw source code:

cd /opt
sudo git clone https://github.com/pjasicek/OpenClaw.git
cd OpenClaw

The project uses a modular structure with separate directories for source code, assets, and build outputs. Take a moment to explore the directory structure to understand where configuration files and game assets will be stored.

Step 3: Obtain Game Assets

OpenClaw requires the original game assets from "Claw" to function. Due to copyright considerations, these assets are not included in the repository. You must own a legitimate copy of the original game to extract these assets legally.

If you have the original game files, copy the CLAW.REZ file to the OpenClaw directory:

sudo cp /path/to/CLAW.REZ /opt/OpenClaw/

The REZ file contains all game graphics, sounds, and level data. OpenClaw includes tools to extract and convert these assets into formats compatible with modern systems.

Step 4: Build OpenClaw from Source

Create a build directory and configure the project with CMake:

mkdir build && cd build
cmake ..
make -j$(nproc)

The build process compiles the source code and links it with the SDL2 libraries. Using -j$(nproc) parallelizes compilation across all CPU cores, significantly reducing build time on multi-core systems.

If compilation succeeds, you'll find the openclaw executable in the build directory. Run a quick test to verify the build:

./openclaw --help

Step 5: Configure Game Settings

OpenClaw uses a configuration file to define resolution, audio settings, and gameplay options. Create a custom configuration:

sudo cp ../config.xml.example config.xml
sudo nano config.xml

Key configuration parameters include:

• Resolution: Set display width and height (headless mode for servers)
• Audio: Enable/disable sound and music
• Controls: Keyboard and gamepad mappings
• Performance: Frame rate limits and rendering options

For server deployments without a display, configure headless mode to reduce resource consumption while still allowing game state management.

Step 6: Set Up Telegram Bot Integration

To enable remote control and notifications, create a Telegram bot using BotFather:

1. Open Telegram and search for @BotFather
2. Send /newbot and follow the prompts to create your bot
3. Save the bot token provided by BotFather
4. Send /mybots, select your bot, and configure commands

Install the Telegram Bot API library for your preferred programming language. For Python integration:

pip3 install python-telegram-bot

Create a bot handler script to interface with OpenClaw:

import telegram
from telegram.ext import Updater, CommandHandler
import subprocess

TOKEN = 'your_bot_token_here'
def start_game(update, context):
    result = subprocess.run(['./openclaw'], capture_output=True)
    update.message.reply_text('Game instance started')
def get_status(update, context):
    # Check if process is running
    result = subprocess.run(['pgrep', 'openclaw'], capture_output=True)
    if result.returncode == 0:
        update.message.reply_text('OpenClaw is running')
    else:
        update.message.reply_text('OpenClaw is not running')
updater = Updater(TOKEN, use_context=True)
updater.dispatcher.add_handler(CommandHandler('start', start_game))
updater.dispatcher.add_handler(CommandHandler('status', get_status))
updater.start_polling()
updater.idle()

This basic bot allows you to start game instances and check server status remotely via Telegram commands. Extend this script with additional commands for save game management, server restarts, and performance monitoring.

Step 7: Create Systemd Service for Auto-Start

Configure OpenClaw to start automatically on server boot using systemd:

sudo nano /etc/systemd/system/openclaw.service

Add the following service definition:

[Unit]
Description=OpenClaw Game Server
After=network.target

[Service]
Type=simple
User=openclaw
WorkingDirectory=/opt/OpenClaw/build
ExecStart=/opt/OpenClaw/build/openclaw
Restart=on-failure
RestartSec=10
[Install]
WantedBy=multi-user.target

Enable and start the service:

sudo systemctl enable openclaw
sudo systemctl start openclaw
sudo systemctl status openclaw

This ensures OpenClaw runs continuously and recovers automatically from crashes or unexpected terminations.

Step 8: Configure Firewall and Security

If your OpenClaw instance requires network access (for multiplayer or remote management), configure firewall rules:

sudo ufw allow 22/tcp
sudo ufw allow 8080/tcp
sudo ufw enable

Replace port 8080 with whatever port your configuration uses. Always follow the principle of least privilege—only open ports that are absolutely necessary.

For added security with Telegram integration, restrict bot access to specific user IDs:

ALLOWED_USERS = [123456789, 987654321]

def authorized_only(func):
    def wrapper(update, context):
        user_id = update.effective_user.id
        if user_id not in ALLOWED_USERS:
            update.message.reply_text('Unauthorized')
            return
        return func(update, context)
    return wrapper
@authorized_only
def start_game(update, context):
    # Your game start logic here
    pass

Troubleshooting Common Issues

Compilation Errors

Issue: CMake cannot find SDL2 libraries.
Solution: Ensure all SDL2 development packages are installed. On some distributions, packages may have different names (e.g., libsdl2-dev vs SDL2-devel). Use your package manager's search function to locate the correct packages.

Issue: Undefined reference errors during linking.
Solution: This typically indicates missing dependencies. Review the CMake output carefully and install any libraries marked as "not found."

Runtime Problems

Issue: OpenClaw crashes on startup with "Cannot open CLAW.REZ".
Solution: Verify the REZ file is in the correct directory and has proper read permissions. The game looks for this file relative to the executable location.

Issue: Black screen or graphics not rendering.
Solution: For server deployments without a GPU, ensure you've configured headless mode in config.xml. If running locally, update graphics drivers and verify SDL2 video support.

Telegram Bot Issues

Issue: Bot doesn't respond to commands.
Solution: Check the bot token is correct and the bot process is running. Use journalctl -u openclaw-bot -f to monitor logs for errors. Verify network connectivity to Telegram's API servers.

Issue: Commands execute but game doesn't start.
Solution: Check file permissions and ensure the bot process has execute rights for the OpenClaw binary. Review subprocess error outputs in your bot logs.

Best Practices

Performance Optimization

Monitor server resources with tools like htop and iotop. OpenClaw can be CPU-intensive during complex scenes. Consider limiting frame rates in config.xml if running multiple instances on shared hardware.

Backup and Version Control

Regularly backup your save game directory and configuration files. Use git to track configuration changes:

git init
git add config.xml
git commit -m "Initial configuration"

This allows easy rollback if configuration changes cause issues.

Security Hardening

Run OpenClaw under a dedicated user account with limited privileges. Never run game servers as root. Implement rate limiting in your Telegram bot to prevent command spam. Use SSH keys instead of passwords for server access.

Logging and Monitoring

Configure comprehensive logging to help diagnose issues. Redirect OpenClaw output to log files:

./openclaw 2>&1 | tee openclaw.log

Set up log rotation to prevent disk space exhaustion:

sudo nano /etc/logrotate.d/openclaw

Implement monitoring alerts via Telegram to notify you of server downtime or resource problems.

Next Steps and Advanced Topics

Now that you have OpenClaw running with Telegram integration, consider these extensions:

• Save Game Management: Implement bot commands to backup and restore save states
• Multi-Instance Support: Run multiple game instances for different players or testing
• Web Dashboard: Create a web interface for easier server management game-server-dashboard
• Automated Backups: Schedule regular backups of game data to cloud storage
• Performance Metrics: Integrate monitoring tools like Prometheus for detailed analytics prometheus
• Container Deployment: Package OpenClaw in Docker for easier deployment and scaling OpenClaw Docker: Self-Hosted AI Assistant

Conclusion

You've successfully installed OpenClaw, configured it for server deployment, and integrated Telegram bot control for remote management. This setup demonstrates how open-source game preservation projects can be modernized with contemporary DevOps practices. The combination of automated deployment, remote control, and systematic monitoring creates a robust hosting environment suitable for personal use or small communities.

OpenClaw exemplifies the importance of game preservation in the open-source ecosystem, ensuring classic titles remain playable on modern hardware long after commercial support ends. By hosting your own instance, you contribute to keeping gaming history accessible while gaining hands-on experience with server management, bot development, and build systems.

Tutorial based on installation guide by Raffaele Gaito, adapted for the OpenClaw community.