Calling All Cars! is a racing / car combat game created by God of War designer David Jaffe and available via download only. The game was developed by Incognito Entertainment and published by Sony. It was released on May 10, 2007. Below you will find a full collection of unlockables for Calling All Cars!

Unlockables:

Blue Bomber: With the options set to a single level five minute game under the Captain difficulty setting, win the Trainyards level using only the helicopter to score.
Cherry Picker: With the options set to a single level five minute game under the Chief difficulty setting, win the Burbs level with 20 or more points.
Dumper: Complete Tournament mode under the Sergeant difficulty setting.
Fleabag: Complete Tournament mode under the Chief difficulty setting.
Highroller: With the options set to a single level five minute game under the Captain difficulty setting, win the Burbs level without allowing your opponent to score.
Litter Box: Complete Tournament mode under the Captain difficulty setting.
Shamrock: With the options set to a single level five minute game under the Sergeant difficulty setting, win any level without allowing your opponent to score.
Sweet Cheeks: With the options set to a single level two minute game under the Captain difficulty setting, win any level without allowing your opponent to score.
Yellow Rose: Complete Tournament mode under the Rookie difficulty setting.
Yellowjacket: With the options set to a single level five minute game under the Captain difficulty setting, win the Alpine level using only the 3 point ramp.