Command Lines - X-Hax/SA2BModdingGuide GitHub Wiki

If the Mod Loader is enabled, you can launch sonic2app.exe with the following commands:

• --level [name/ID] or -l [name/ID] to launch the game directly into a level. Click here for a list of levels.
• --chaoarea [name/ID] to start the "ChaoWorld" level into a specific area. Click here for a list of areas.
• --character [name/ID] or -c [name/ID] to change the default character. Click here for a list of characters. 2P-Only Characters are not yet supported.
• --position [x] [y] [z] or -p [x] [y] [z] to spawn at a specific position.
• --savenum [ID] or -s [ID] to launch the game with a specific savefile. The ID is the number after "SonicDX" in the savefile name.
• --player2 [name/ID] or -p2 [name/ID] to add a second player with specified character. The game will be launched in 2P mode.
• --event [ID] or -e [ID] to start the game directly into an event. Won't work if --level is specified.