At some point, you'd probably want to show off all your cool profile frames, badges, and games to all your friends in Robot Cache, but to do that, you need to add them to your Friends first.
To start, login to your Robot Cache account and head down to the "Friends" section of your current page, which is found on the bottom right of the page.
Click on "Friends" to open it, and enter your friend's Cacher name.
Select the user you wish to invite and click on "Request Friendship".
This will send them a friend invite, and if they accept, you'll be able to see them on your list of "Friends".
If a user you wish to invite doesn't have a Robot Cache account yet, you can send them a friend invite by sharing them your invite code, which prompts them to sign up and create a Robot Cache account. To do this, head over to your profile section and click on "Invite A Friend" to get started. More information on this feature be found on this page.
Congratulations! You've invited a friend! You'll receive an email notification when they've accepted your invite!