How much percent do you need to complete gta?

100 % to get to 100 % you need to complete all story missions find all random characters shoot all the 200 pigeons do one of each of activertys with the renaming friends you have near end game do all jobs you friends want you to do expt Romans taxi missions you don't have to do them. unlock all friends special enhancements E.G patrics car bombe jacobes wepions Brucies hellie rides and Romans free taxi surface