Post passwords or codes that are forever etched into your brain.

Aladdin GENESIS - level skip ABBA ABBA
sonic 2 level select - 19 65 9 17

>>4199960
The Konami Code, and most of the Doom cheats, plus MIL from Wolfenstein 3-D. There's a bunch of others, but those are the BIG ones.

Gremlins 2 nes last boss

NXRD

>>4199960
STCJDH. Final level password for...

...Bubsy 1.

left right down up left right down up triangle (5) cross (9) start

>>4199960
Down Up Left Left [A] Right Down (DULLARD)

Blood code for Mortal Kombat on Mega Drive.

UP, C, Down, C, Left, C, Right, C, Hold down A & press Start

File: 1453432231422.jpg (130KB, 383x472px) Image search: [Google]

130KB, 383x472px

Yoshi's Island

Hold select, X X Y B A

hold L1, L2, R1, R2 and press up down left right right left down up

god mode on twisted metal 2

also those similar codes for ammo, health and vehicles for GTA 3 that you would put in so fast youd just eventually be sliding your finger across the dpad in the blink of an eye.

NTHGHTDGDCRTDTRK - Turok Big Cheat

BEWAREOBLIVIONISATHAND - Turok 2 Big Cheat

Never had Turok 3 back in the day.

FUCKM E1111
11111 11111
11111

Pokemon Red/Blue "encounter anything" code
01xxD8CF

Same for Gold/Silver
01xxEDD0

000000 000020
000000 000020

1415 5585 7823 6251

MM7

Does a few things, but just typing it in and doing nothing special it takes you to the Wily fight with every item in the game. If you hold LR on controllers 1 and 2 and press start, it'll start a two player vs. mode where you can play as either Mega Man or Bass.