Ratchet and clank 3, the cheat code is told to you in a cutscene:

"Aren't you going to unlock his secret costumes? Here, I'll put in a cheat code. Up up down down left right circle square square... Haha! Look! He's in a tutu!"

As others have already mentioned, IDKFA for Doom and didn't it work in Doom 2 as well?

I only ask because when ID Software released Heretic, a swords and sorcery style Doom game, I remember typing in IDKFA, expecting the same results. It was the Doom engine after all. Except typing in the classic code kills you instantly!

Another isn't strictly a cheat code. On the old 8bit computers the UK, you could enter some programming code to change the memory before loading in a game. (This is over simplified.)

Because of the altered memory, it would effect the game in some way. E.g. infinity health or lives.

I found a listing in a magazine which you could type in to help with the ZX Spectrum version of Batman: The Movie.

In this platform game, with the cheat, when a bad guy tried to climb a ladder, they would freeze.

This was very helpful and worked wonderfully all the way through the game. That was until you reached the very end whereupon the Joker was on a rope ladder attached to a helicopter.

The code interfered with the end of game boss in a way it wasn't expecting and the game would crash.

Thanks.

OBOYOBOYY for hyper speed in guitar hero 2 and 3

007 373 5963

Mike Tyson's Punch Out

A B A C A B B

"Get over here!"

I had San Andreas on PS2 as a kid, only played it on PC a little bit as an adult; but, the fact that you type the cheat codes on a keyboard means they kinda make words, so i forgot the PS2 ones and i remember some PC ones.

AIWPRTON

HESOYAM

I remember the cheat but not the exact game lol. Definitely Sega Mega Drive though.

ABRACADABRA (R for d-pad right, D for d-pad down).

Going by a Google search it could've been Vectorman or Ecco 2. Or both because I played both a lot back then.

DNCORNHOLIO
DNSTUFF
god mode and all guns, items, money in Duke Nukem 3D

JUGGYDANCESQUAD - Blood Rayne

If ya know, ya know

and in the sequel "HAVETHISDARKREALITYTAINTQUEEF"

Simply because.... well that statement is funny

YOUCANSEEANICEICEKEYWHICHYOUCANHAVEFORFREE - Because that damn key tortured me as a kid

and finally

BEWAREOBLIVIONISATHAND because I was too dumb to play Turok 2 fairly

prince.exe megahit

GZELVXSE

Game Genie code for invincibility in Super Mario Bros 2.

San Andreas Max Health + $250k. Saved me in the warehouse mission in Las Venturas lol. I hope I'm getting this right:

R1, R2, L1, X, LEFT, DOWN, RIGHT, UP, LEFT, DOWN, RIGHT, UP

Flying car cheat in San Andreas. I don’t know what the buttons are, by my muscle memory is so ingrained that if I start it I can usually get it after 1/2 attempts. Even if I haven’t touched the games in years.

Shift+Control+B (in the Polish version), then klapaucius/rosebud from The Sims and you could do rosebud;!;!;!;!;!;!;!;, it would error out because of the trailing semicolon, but still add money to your account, so you just held down Enter until you were satisfied with the amount of cash in your account

bb.moveobjects

I wasn't particularly wowed by the gameplay of the sims 4, but I really enjoyed the building mode, especially with the freedom to put stuff exactly where I wanted, collision and autosnapping be damned.

Triangle triangle square circle X L1 L1 down up

Spawns the Hydra in GTA SA

NOPOLICEPLEASE (GTA3)

BARACUDA for level select in Sonic 3D Blast.

Alternatively, CALLACAB for Vector Man.

Up up down down A B A B Start

&

A B A B A C C

I’m old.

Doom had IDKFA that just basically gave you all the weapons and keys. I was a pretty young kid when that game was popular and all I wanted was all the guns.

It’s not a code, per se, but the method to get unlimited money on SimCity for SNES is forever in my brain. (I didn’t always use it but sometimes, I just wanted to make a cool city and not do the tax and budget stuff.)

the first 'cheat code' that came to mind here isn't for a game:

Select • Play • Select • 30 • Select

WE5T1

B A B A ‌‌↑ ↓ B A ← → B A Start

r1 r2 l1 r2 left down right up left down right up <- all weapons in gta 3

MADEMAN <- all weapons gta 1

Skitchin

At the warning screen, B A Down A Start Start (Spells BADASS)

Activates cheat mode, and then you can use the password screen to input cheats. But the only one I used is MONEY which starts you with 10,000 dollars or something.

Leavemealone - GTA Vice City

Rocketman - GTA San Andreas

Use any ship you want in a mission in Star Trek: Tactical Assault for the Nintendo DS.

Up, Down, Left, Right, Select, Start, B

DNNOCLIP

klapaucius - money cheat for Sims 1

DULLARD 😅

Also a bonus code I won't forget:

ADE-NAI-WRA-LKA

You can all guess what games they are from.

Sega Mega drive from when I was 3-4 years old.

Sonic the hedgehog - unlock all levels cheat: Up down left right A Start (twice)