Minecraft: Open to LAN -> allow cheats
I really thought I discovered a massive bug with that one when I was little lmao

Name your character Totoro for invincibility in all Fromsoft games.

Star Wars Battlefront II PS2 invincibility:

Pause

Hold L2/R2

Up, up, up, left, down, down, down, left, up, up, up, left, right

tuck tuck tuck and arrrrwalktheplank are two of my favourites. The first summons a monster truck in AoE3, and the second has a large pirate ship jump into the battle in Free Space 2.

Actually there is a set of missions in FS2 that can only be reached by cheating to become invincible during an event you were supposed to die I think.

I find it neat when companies put in assets and extra content most players wont find without trying to break things a bit.

ABYXABYXBABAYXXABYX - infinite thermal detonators in one of the Star Wars SNES games

Everylittlethingshedoes - unlock all magic in Warcraft 2

BEWAREOBLIVIONISATHAND - something in Turok 2. I think all weapons?

32167 (Heroes of Might and Magic 2)

Up down left right right left down up

Poweroverwhelming

Radiofreezerg

Warcraft 3 - whosyourdaddy (makes your units invincible and one-hit every enemy)

LEAVEMEALONE (GTA VC) HESOYAM (GTA SA)

Contra on NES.

Crack a candle
One step forward
One step backwards
Turn around three times
Jump forward

noclip

MARKSTEAM in the name box would unlock all tech and give a bunch of money in Syndicate on the Amiga.

YO BRO GO ROB BOB

guitar hero 3 unlock all songs

Play the four colors that do not match each character in the phrase

R2 R2 L1 R2 Left Down Right Up Left Down Right Up.

DraculasTeabags

UP, C, DOWN, C, LEFT, C, RIGHT, A+C+START Sonic 1 debug mode.

PORNTIPSGUZZARDO All acievements and $500,000 in Sim City 2000. You could do it over and over for unlimited money.

Wampa Stompa

HeyGabbaGabba for Descent. Tried it in Decent 2 and it knocked me down to 1hp :D

DIPSTICK to enable chests in rise of the trial. SEEYA for god mode where the protagonist just walks around with his hand of God yawning at how boring it is when there's no challenge. CUJO for dog mode.

Also, LONDON and NODNOL to enable/disable fog.

Aspirin. I learned how to type in GTA as I couldn't figure out how to pause the game and type it so had to be quick.

thisisunsafe

Also from San Andreas (or maybe Vice City) R1 R2 L1 R2 left down right up left down right up. It was used for different weapon sets and I think you could change the dpad combo at the end for different sets (eg left down right up left down down down)

mpkfa God mode for Blood.

TODAY IS A GOOD DAY TO DIE

ABACABB - MK blood code Down up left left A Right Down (DULLARD) - MK cheat menu Up C Down C Left C Right C Hold A+Start - Sonic 2 debug mode

pow

hold: r1, r2

press: up, down, left, right, right, left, down, up

Setting the name to COOPERTEAM in Syndicate (DOS)