TGRTVN

Final level in Bubsy.

WC3:

WhosYourDaddy - invincible units, buildings, and one shot the enemy

GreedIsGood X - gives X gold and lumber

GTA:SA

HESOYAM - cash, hp, vehicle repair (on top of my head)

AEZAKMI - locks wanted level

UZUMYMW - a pack of weapon, IIRC no. 3 of 3

BAGUVIX - unlimited health

FULLCLIP - unlimited ammo

DULLARD for cheat mode on SNES and I think Genesis Mortal Kombat.

God mode in Duke Nukem 3D, "dncornholio". Come get some...

Up, down, left, right, A & start at the same time. I still sing the jingle when sonic 1 starts

DNCASHMAN to make it rain money in Duke Nukem 3D

Down up left left A right down to get the cheat menu on Mortal Kombat on the Sega Megadrive.

On Revenge of Shinobi set the number of shurikens on the Options screen to 0 and wait 20 seconds. The zero turned into an infinity symbol, giving you unlimited shurikens.

ROBINWOOD (I think) in AoE II

Black sheep wall - StarCraft map reveal

Starcraft (original): black sheep wall

Reveals the whole map by removing fog of war.

Racecar

How do you turn this thing on

Mk3 for super Nintendo

Kool stuff - Up up down down left right a b a

Kooler stuff - Select b a right left down down up up

Scott's stuff - X b a y up left down right down

Descent. Gabba Gabba Hey

How do you turn this on (Age of)

Fly and ghost (Unreal 1 : to observe every minute details of the map))

ABBAABBA. Skip level code for Aladdin on the Sega Genesis.

Edit: and the Zelda name cheat for NES!

furious the monkey boy

xyzzy

Call Cousin Vinnie

It gave you a boatload of money in SC3K

Warcraft III: iseedeadpeople to remove fog of war.

genie jafar aladdin abu

Fuck that lava level.

FROTZ

Power overwhelming ... Glittering treasures.

Warcraft 2

The one from the sims I it was “katching” one and the other was “motherlode” maybe the spelling is not correct but I will never forget those codes.

JUSTINBAILEY

Play without the power suit in OG Metroid

Surprised nobody mentioned "motherlode".

Something like 50k simoleons in The Sims 2. Absolutely essential to any save file.

Porkcharsui in the original pc version of Grand Theft Auto. If you named your character this, you had an overlay with coordinates so you could find your way easier, you'd get all the guns and the possibility to toggle a kind of sped up mode.

Oh and howdoiturnthison in Age of Empires 2 to get an AC Cobra with machine guns

Original Mortal Kombat blood code:

ABACABB

HESOYAM

GTA:SA extra health and money.

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.

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