An old glitch in Call of Duty: Modern Warfare 2 allowed a player to “cook” an FGM-148 Javelin--or in layman’s terms, prime a missile launcher to fire without actually firing the weapon. Although the player could then only run around and physically hit enemies in the face to keep the glitch alive, the trick turned the player into the digital equivalent of a suicide bomber. For as soon as an enemy shot the player dead, kerboom – the “cooked” missile launcher would explode. If the kill was fairly close-quarters, the player’s attacker would usually die as well.

This one was fun. Upon the game’s release, players discovered that they could gain an absurd amount of experience in every multiplayer match by having friendly engineers shoot their own EOD bots. The player would then repair the bots; the engineers would keep shooting. Next match? Switch. End result? Massive leveling up for everyone.

If the Rainbow Road shortcut isn’t the biggest exploit to ever appear in a racing game, we don’t know what is.

GTA 3 has quite a few cheat codes (remember those?) but the flying tank was not one of them, all you had to do was find a long road, aim the cannon behind you and fire as quick as possible, eventually you would start flying.
This wasn’t the most efficient form of transport, nor was it the safest, but it was definitely the most entertaining way to get from point A to point B.

To execute the glitch you need to enter a battle, select the item you want to duplicate, confirm it, then select another item and when the arrow is over a character’s head and cancel the item; every time you do this the item will duplicate.
You can also use this glitch in combination with the morph materia, allowing you to horde source items; these items increase one of your stats

This exploit allows you to bypass the law with the simple use of a large container.
All you need to do is place a bucket over the shopkeeper’s head and you won’t get caught for taking whatever you please, be it a suspicious book on Argonian maids or a sweetroll, there is no limit to what you can take using this exploit.

To Sword Fly you need a warthog and a sword, you then need to get into the passenger seat of said hog and lock on to an enemy, have them move away and then attempt to attack them, the results are hurtling.
Unfortunately, this exploit wasn’t reintroduced in the Master Chief Collection; maybe if they left it in people wouldn’t have noticed the crippling issues with its multiplayer.

When you talk to the old man in pallet town your name is briefly changed to ‘OLD MAN’, during this time the Programmers decided to store your actual name in the space where wild encounters are calculated. When you go to a new zone with grass this would be reset, however, since Cinnabar Island has no grass and has the potential to find wild Pokémon this generates the new bug Pokémon: Missingno.

Mario's backwards jump functions as a kind of warp jump, skipping Mario through almost half of Super Mario 64.

The endless lives exploit in World 3-1 that found Mario racking up points and unlimited lives this still works on modern Mario games today.