Well no, it just stops certain achievements from being earned...( Only some cheats stop achievements )
use the cheats
Use cheats.
No
Cheats are like helping part of game.You can complete mission without cheats.Its cheating to use cheats.
No, but you can use cheats to BEAT the missions No, but you can use cheats to BEAT the missions
dude, there are no secret cheats, just use gta4.net for all the cheats, i mean, there is only like 15.
Most if not all of the cheats for gta iv are here http://www.gta4.net/cheats/ But be careful some cheats can block achievements, I'm not sure about trophies and you can only use them in campaign.
the cheat for monstertruck in GTA vice city is monstermash
no unless you use cheats and corrupt your game sorry im not trying to be rude
The best site that i use for all of my cheats is in the related links below. They have cheats for every game you could think of on any system you want. Even ps1.
use any search engine and search "GTA San Andreas cheats." it will give you a variety of different websites though they might have ALL of the cheats. Keep Searching!
Because cheats cause glitches like my gta san Andreas i cant save because too many cheats