Sonic Adventure 2: Battle Network

Sonic Adventure 2: Battle Network is a netplay mod for Sonic Adventure 2 PC which utilizes the SA2 Mod Loader perform code injection and implement hooks to track changes to critical gameplay data and synchronize that data over the internet.

Usage

To play Sonic Adventure 2 PC online, you must first install the following pre-requisites:

Pre-requisites:

• SA2 Mod Loader (source)
• Microsoft Visual C++ Redistributable for Visual Studio 2015, 2017 and 2019 (x86)

You will need to run the game with command-line arguments. You can do this via command-line interface, or by creating a shortcut to sonic2app.exe and adding them to the end of the "Target" field.

Hosting a game server

• Choose a port. We will use 27015 as an example.
• Ensure that the port is open on your router.
• Run the game with the following parameters:
  • --host 27015
• Enter the 2P BATTLE menu. The music should change to reflect hosting status. DO NOT press start for player 2.
• When player 2 connects, a success jingle will play, and the game will wait for both players to press the Accept button (A).

Joining a game server

• Get the address of the server you are connecting to. We will use 127.0.0.1.
• Get the port of the server you are connecting to. We will use 27015.
• Run the game with the following parameters:
  • --connect 127.0.0.1:27015
• Enter the 2P BATTLE menu. The music should change to reflect joining status. DO NOT press start for player 2.
• When connection is successful, a success jingle will play, and the game will wait for both players to press the Accept button (A).

All command-line parameters

Parameter	Offline	Client	Server	Description
--host port or -h port	N/A	N/A	N/A	Host a server on the specified port.
--connect address:port or -c address:port	N/A	N/A	N/A	Connect to a server at address on port port.
--no-specials	✔	❌	✔	Disable all special abilities given by rings (speed up, etc.).
--cheats	❌	❌	✔	Allows you to teleport to the other player by pressing Y + D-Pad Up. Also enables built-in cheats.
--netstat	❌	✔	✔	Enables network statistic logging. Saves as netstat.recv.csv and netstat.sent.csv in the game directory.

Compiling

Requirements

• Visual Studio 2019 or newer

Build

1. Open SA2 Battle Network.sln in Visual Studio 2019
2. Build!