Coin Fiends are a game mode in Platform Racing 3 similar to Coin Battles in the Super Smash Bros. series. Its concept was later reworked and brought over to Platform Racing 2 in the form of Alien Eggs.
The mode's icon seen on the lobby is a yellow-colored swirl.
Players compete against each other to see who can collect the most coins within the time limit. Coins are found inside blocks that are breakable, with each block containing exactly 3 coins. If the coins are not grabbed after 8 seconds, they fade away and can not be collected.