What else is there to do in gta 4?

I love gta4, incredible graphics, shooting is better than lots of 3rd person shooters, there is so many detail

I beated the game, is that it? I don't want to find200 pigeaons, I finished the jobs and police thing.
I don't have parachutes or dualwield of guns, no jetpacks, tanks, planes jets, can't swim underwater, clthing is little, only 2 hats and 2 glasses, I don't have xbox live, I am starting to think that San andreas was better, no quad bikes! Police in bikes, I know gta4 police is better, but AI improvement is expected not a feautere, no RPG weapon upgrades, parachuting is gone, less weapons and cars, no country side or farmers to kill, no house robberies, insead they have dating and bowling and darts, whata hell, they shows are nice but they will. Repeat
.

Gta4 is like a really really good steak, but it only weights 4 ounces

San andreas is a really good steak that weights 18 ounces

I think that's a fair assessment. No doubt it is a great game, but after I completed the story and some side missions, I went back to CoD4. I've only played the multi player option 3 times in GTA:IV.

Their are two ending. Go back through the games and just kill or let live the opposite people.