anyone who is not able to use mouse in grand theft auto vice city game, please read the below process. steps: 1) right click on gta-vc.exe( the icon which launches the game) 2) click on properties 3) click on compatibility tab 4) check(tick mark) "run this program in compatible mode for" 5) just below that select from the list of os to windows 98/windows me option now run the game. you can also get a list of cheat codes by clicking below. www.gamefaqs.com/pc/561641-grand-theft-auto-vice-city/cheats Thanks! Like, this thread if it was helpful for you.