Cheats marked with an * cannot be turned off.
Saving with Cheats enabled isn't recommended, as it can get quite glitchy.
When you're using Cheats, Achievements will be turned off on that savefile.

To activate the cheats, simply type in the combination via your keyboard.

Infinite Ammo - FULLCLIP

Hitman Level for all Weapons - PROFESSIONALKILLER

Weaponpack 1 - LXGIWYL

Weaponpack 2 - PROFESSIONALSKIT

Weaponpack 3 - UZUMYMW

Remove Wanted Level - TURNDOWNTHEHEAT

No Wanted Level - AEZAKMI

Two Star Wanted Level - TURNUPTHEHEAT

Six Star Wanted Level - BRINGITON

Full Health, Armor & 250k GTA$ - HESOYAM

Add Parachute to Inventory - AIYPWZQP

Infinite Air under Water - CVWKXAM

Kangaroo Jumps - KANGAROO

Powerful Punches - STINGLIKEABEE

Set Bounty on CJ - BAGOWPG

Maximum Respect - WORSHIPME

Maximum Muscles - BUFFMEUP

Maximum Sex-Appeal - HELLOLADIES

Maximum Fat - BTCDBCB

Zero Muscles & Fat - KVGQZQK

Suicide - GOODBYECRUELWORLD

Faster Clock Time - YSOHNUL

Faster Gameplay - SPEEDITUP

Rhino Tank - AIWPRTON

Jetpack - ROCKETMAN

Hovercraft - KGGGDKP

Hunter Helicopter - OHDUDE

Hydra Jet - JUMPJET

Stunt Plane - FLYINGTOSTUNT

Golf Caddy - RZHSUEW

Hotring Racer 1 - VROCKPOKEY

Hotring Racer 2 - FPJTQWV

Blooding Banger - OLDSPEEDDEMON

Quad Bike - FOURWHEELFUN

Rancher - JQNTDMH

Stretch Limo - CELEBRITYSTATUS

Romero Hearse - WHERESTHEFUNERAL

Trashmaster - TRUEGRIME

Bulldozer - ITSALLBULL

Tanker - AMOMHRER

Monster Truck - MONSTERMASH

Always Green Traffic Lights - ZEIIVG

Only Show Driver & Wheels - WHEELSONLYPLEASE

No Peds & less Traffic - GHOSTTOWN

Roadrage - YLTEICZ

Only Fast Cars - EVERYONEISRICH

Only Pink Cars - LLQPFBN

Only Black Cars - IOWDLAC

Countryside Cars - FVTMNBZ

Only Cheap Cars - EVERYONEISPOOR

Peds are Armored - FOOOXFT *

Peds Attack with Weapons - BGLUAWML *

Peds attack each other - AJLOJYQY *

Peds want to fight - BAGOWPG *

Beachparty Mode - LIFESABEACH *

Purge Mode - STATEOFEMERGENCY

Peds are Recruitable - SJMAHPE

Only Gangs the Streets - ONLYHOMIESALLOWED

Peds look like Elvis - BLUESUEDESHOES

Hot Weather - ICIKPYH

Sunny Weather - PLEASENTLYWARM

Cloudy Weather - ALNSFMZO

Foggy Weather - CFVFGMJ

Sandstorm - AUIFRVQS

Storm - CWJXUOC

Night - NIGHTPROWLER

Sadly, not all Cheats from the Original Trilogy made it into the Definitive Edition.

- Cars fly away after colliding

- Invincibility against Melee & Weapon Damage

- Slowmotion

- Never Hungry

- Invisible Cars

- Triad Theme

- Peds are recruitable & have Rocket Launcher

- Gang Members spawn faster

- Always Midnight

- Gang Members replace Peds

If I got any Cheat wrong, please let me know in the Comments.