To use the Utgard map first of all you need to copy the script you can find in the rescources tab or in the discord server, then open RC Mod > Multiplayer > Offline mode > Select Custom (No PT) or just Custom if it's Eren Titan% > When you get into the game just paste the script into Custom Map and select waves (put the titan spawn cap to 999 or similar) and Save then go to Game Settings and hit Reset and Save and type /restart in chat.