How to install.
1. Install the game files
Open the gta3_game_files folder and drag & drop its entire content into your game folder (where GTA3.exe is located).
2. Configure your connection
Open AP_connexion.txt (now next to the game .exe) and edit it with your room's info:
ap_autoconnect=1
ap_server=archipelago.gg:12345 ; your room's address and port
ap_slot=YourSlotName ; your player/slot name
ap_password= ; leave empty if there is no password
3. Install the APWorld
Double-click gta3.apworld to install it into Archipelago.
4. Set up your YAML
Open GTA3.yaml and edit it to your liking:
Set your player name (must match ap_slot above)
Adjust the game options
Then place the YAML in your Archipelago Players folder and generate / host your game as usual.
5. Play !