The reward for 100% completion in GTA IV is a '100% Game Completion.' message in the top left corner and the ability to buy an unlimited amount of ammunition, although it still costs the same as before, and the Key To The City Achievement is unlocked. Do 20 vigilante missions via police computer using the 'Recent Crimes' option.Complete all the Most Wanted missions via police computer.Do all 16 random character missions (excluding Jeff Harlingford, Ivan Bytchkov, Clarence Little, and Cherise Glover).
To attain 100% Completion in Grand Theft Auto IV, the player needs to do the following:
