There are many special achievements in "Test Drive Unlimited: Crown of the Sun", and the achievement of numerical advantage is one of the simpler ones. The way to complete the achievement is to join the group for the first time. As long as you join the group, you can complete the achievement. Now, you can find groups to join in Friends and Players on the right side of the pause menu.
How to achieve unlimited test drive Sun Crown’s number advantage achievement
Advantage in numbers - joining a group for the first time
To join a group, you need to go to "Friends & Players" next to Settings on the right side of the pause menu. Click on any player or friend and select the "Invite to Group" option. If they join, you will all achieve this achievement.
To join a group, you'll need to head over to Friends and Players located on the right of the pause menu, next to settings. Click on any player or Friend and select the 'invite to group' option. If they join, you will both get this achievement.
