Here are some cheat codes for GTA San Andreas.
Type these codes in during gameplay.
SPEEDFREAK: All Cars Have Nitro
NIGHTPROWLER: Always Midnight
FLYINGFISH: Boats Fly
BUBBLECARS: Cars Float Away When Hit
STATEOFEMERGENCY: Chaos Mode
BLUESUEDESHOES: Elvis is Everywhere
SPEEDITUP: Faster Gameplay
CRAZYTOWN: Funhouse Theme
ONLYHOMIESALLOWED: Gang Members Everywhere
BIFBUZZ: Gangs Control the Streets
ROCKETMAN: Have Jetpack
PROFESSIONALKILLER: Hitman In All Weapon Stats
CJPHONEHOME: Huge Bunny Hop
FULLCLIP: Infinite Ammo, No Reload
WHEELSONLYPLEASE: Invisible car
NATURALTALENT: Max All Vehicle Skill Stats
BUFFMEUP: Max Muscle
WORSHIPME: Max Respect
HELLOLADIES: Max Sex Appeal
KANGAROO: Mega Jump
NINJATOWN: Ninja Theme
STICKLIKEGLUE: Perfect Handling
ROCKETMAYHEM: Recruit Anyone (Rockets)
GHOSTTOWN: Reduced Traffic
BRINGITON: Six Star Wanted Level
SLOWITDOWN: Slower Gameplay
ITSALLBULL: Spawn Dozer
OHDUDE: Spawn Hunter
JUMPJET: Spawn Hydra
MONSTERMASH: Spawn Monster
FOURWHEELFUN: Spawn Quad
VROCKPOKEY: Spawn Racecar
WHERESTHEFUNERAL: Spawn Romero
CELEBRITYSTATUS: Spawn Stretch
FLYINGTOSTUNT: Spawn Stunt Plane
TRUEGRIME: Spawn Trashmaster
GOODBYECRUELWORLD: Suicide
PLEASANTLYWARM: Sunny Weather
SCOTTISHSUMMER: Thunderstorm
EVERYONEISPOOR: Traffic is Cheap Cars
EVERYONEISRICH: Traffic is Fast Cars
TOODAMNHOT: Very Sunny Weather
PROFESSIONALSKIT: Weapon Set 2, Professional Tools
Enjoy. Peace!