Cheat codes you will always remember.

[demoman_chaos]

IDKFA- Keys, weapons, and ammo for Doom 2
IDDQD- God mode on Doom 2
IDclv##- Level Select on Doom 2

R2, R2, L1, R1/R2/L1/L2, Up, down, left, right, up, down, left right- GTA3 codes for Health, Armor, weapons, and money (don't remember exactly which was which).

pkweapons- All weapons in Painkiller
pkgod- God mode in Painkiller

 

[Celinis]

poweroverwhelming Starcraft 1

 

[Dafttechno]

Donkey Kong Country
BARRAL - B, A, R, R, A, L - 50 Lives
DARBYDAY - Down, A, R, B, Y, Down, A Y - Sound Test
DYDDY - Down, Y, Down, Down, Y - Practice Bonus Rounds
BADBUDDY - B, A, Down, B, Up, D, D, Y - Let's Player 2 trigger character switch.

 

[Atmos Duality]

*JUSTIN BAILEY
*------ ------

*[L1 + R1 + L2 + R2] UDLRLRDU

*(on title screen, 2P: D + B, press select)

And about a dozen others. But those are the ones I recall using a lot.

 

[MetalMonkey74]

IDDQD
IDKFA

idspispopd!!

 

[moose_man]

ISIS, HEAR OUR PLEA

 

[DevilWolf47]

The Orange Box 360 cheats.

Refill ammo supply for equipped weapon in Half-Life 2:

Y, B, A, X, RB, Y, X, A, B, RB.

Why do i remember this?
It was frustrating to use. I started to use it when i got the crossbow and enjoyed having a scoped weapon, my only complaint for Half-Life 2 being that it doesn't really tailor itself to people like me who enjoy precision shooting, but at that point i had the Gravity Gun so pressing RB switched weapons. I finally figured out that i needed to make it so that the game would cycle between the crossbow and gravity gun when i pressed RB and started the sequence with the gravity gun equipped.

 

[The Code]

BADBADLUC was the level skip code for one of the Batman games on the SNES back in the day. It was one of the decent ones, if that helps.

 

[Andrew_Mac]

left, right, R1, R2, L1, L2, up, down, left, right.

Grand Theft Auto: Sanandras.

Jetpack!

That's just one of the cheats I can remember from that game. They are all surgically implanted in my brain...

 

[Byr0m]

humanzee - evil genius - activated the ctrl-(X) codes (ctrl-c: +$100,000, ctrl-a: spawn one of EVERY minion and henchmen at the mouse cursor).

I mean, come on, a HUMANzee, a chimpanzee crossed with a human, cool but slightly weird and ethically wrong...like the game itself

 

[messy]

select select circle circle L1 L1 R1 R1 - 50 medkits on Tomorrow Never Dies. Man I loved that game, its weird nowadays I would never cheat in a game but back then it was all the rage.

EDIT: FREEFORALL, Diddy Kong Racing, all weapon balloons give three start weapons. Basically ten rockets for the prices of one.

 

[ImpostorZim]

The master cheat for the first Turok game on the N64. RBNSMTH. I'll never forget that one (It was easy to remember, cause it was Robin Smith without vowels).

 

[Motakikurushi]

Go to the Safari Zone
Fly to Cinnabar Island
Surf around the edges
Catch a Snorlax/Break your game

Infamous among my friends and my primary school. It's probably the most memorable cheat I can think of. Certainly the most sporadic one. Have people listed all of the things MissingNo. can do?

 

[cathou]

it may be really weird, but that code is in my head for more than 2 decades now...

007 373 5963

the code to get to mike tyson in the original punchout...

 

[Gammaj4]

helpusobi1
force_lightning 4

Congratulations, you can now beat Jedi Knight: Jedi Academy with no problems.

 

[LiftYourSkinnyFists]

Up, Down, Left, Right, Hold A & press Start.

Cookie to the first person to tell me what revolutionary gaming masterpiece can be cheated with that code!

Up, Down, Left, Right, Hold A & press Start. That's Sonic 2?


AOEII
cheese steak jimmy's
how do you turn this on
marco
polo
aegis
torpedo2

 

[Jabberwock xeno]

"Jabberwock Xeno threw a pokeball!"

*hits the A and B button as it bounces, then spins the d-pad as it twitches*

I know it's fake, but I still do it.

 

[chromewarriorXIII]

Konami code.
"Lumberjack"
"Robin hood"
"Rock on"
"How do you turn this on?"

 

[disturbed_one]

aspirine
nuttertools

I can't remember more... but I knew them all by heart