Hunt down all 200 "Flying Rats" (pigeons) and complete all 50 stunt jumps.
Some missions force you to choose between characters, which can impact your rewards. For instance, choosing between Derrick or Francis offers different monetary gains and perks. 100% Completion Checklist
To achieve "Key to the City" (100% completion), you must finish more than just the main story: grand theft auto IV
Socializing with friends like Roman, Brucie, and Little Jacob is not just for flavor—it unlocks special abilities, such as free cab rides or weapons delivered to your location.
Complete all main missions and specific side tasks like Little Jacob’s drug deliveries and Brucie’s exotic exports. Hunt down all 200 "Flying Rats" (pigeons) and
Complete 30 "Most Wanted" missions and 20 "Vigilante" missions found in police vehicle computers. Quick References & Resources GTA 4 Guide - IGN
Win at least one game of pool, darts, and bowling, and beat the high score in the QUB3D arcade game. 100% Completion Checklist To achieve "Key to the
GTA IV features more realistic driving physics than its predecessors. Ease up on the gas during skids rather than making sharp turns. When riding motorcycles, waiting a few seconds before accelerating lets Niko put on a helmet, which reduces damage from crashes.