Grand Theft Auto 4 (GTA 4)
One Hit Kill - doubtful. never been made for a GTA game as far as i know. and this one is even harder to make trainers for so yea probably never gonna happen.
One hit vehicle destroy - won't work because the same would happen to you. it's how gta is made
slow vehicles - again. would do it to every single vehicle. though would still help in chases.
kill all targets - would be way to hard to do and once again never been done in a GTA game.
no vehicle damage - this is always a hard option unless it's a garage editor. way to early to see if this is possible probably within another month someone might manage this.
unlimited ammo/no reload - probably happen. hopefully within the next month.
complete current mission - never going to happen. WAY to hard to do.
no fatigue - probably possible.
super fast run/jump/save position. doubt it. really doubt it. at least anytime soon.
super zoom - doubt it's possible zoom is hard coded into the game.
no skid is handling and theres no perfect handling cheat so this probably wont happen. just learn how to drive in the game.
lock helicopter altitude. not possible. simple as that. would just be too hard and no one would bother trying to do it. and wouldn't really be worth doing.
No Vehicle damage is possible but harder in GTA IV (till you have more than one damage zone like in Crysis)
One hit vehicle destroy is possible but hard to do. (same way as no vehicle damage)
slow vehicles is also possible too (same way as both above just edit every vehicle except yours)
We see much things are/would be possible but xlive and hidden adresses make it much harder.
I think it will take some weeks/months till everything is working.
If we could get a no fatique and slow all vehicles to a crawl speed cheat that would enable you to just run up to a vehicle and blow it away or shoot the people inside it or or on it(bikes).You could also just swim up to the boats you are chasing and get on them and blow the drivers away.That would really help in the hard chase missions.Like I stated my cheat wants are a Dream Sheet so I realize many or none of them will ever be done.This game is so hard to apply cheats to It would have to be someone who wants to dedicate all their time to just this game only.