As Jig has pointed out, mine is a reward for helping (admittedly very little, although not by choice) Mahz develop the website that we all know and love. The rest are all prizes given out to the winners of writing contests (or just fancy fonts).

You can see all the trophies (except mine) here:

http://www.roleplayerguild.com/trophy-groups

and mine:

http://www.roleplayerguild.com/trophies/1