Trophies

Trophies are a rating method of the skills of a player in ScrapTD. They define the arena you're in, the players you get matched against (max trophy difference between players can be 1500) and even Magnets/win (related to Arena too).

you can win (or lose) between 3 and 60 trophies (max used to be 120, or even 320, which was bad as hell (when you lost that many)), depending completely in the trophy difference between both players.

Arenas
In ScrapTD there are currently 7 arenas (without name) which are 500 Trophies apart from each other.