Glitching

Video game glitches that go "out of bounds" are mostly performed by either moving through walls or corners or jumping to places in the map that do not have invisible walls. For example, in Tony Hawk's Underground 2, in the L.A. level there is a glitch that can allow players to leave the provided play area and pass through the background.[3] Another example of this is a glitch on the Nürburgring track in Gran Turismo 5 where if the player squeezes through any gap between the walls, the car can drive through the scenery and under the paved course and can finish a lap or the race faster than usual by driving directly under the finish line in the direction of the race's path. The massively multiplayer online game Need for Speed: World also had a bug in the city Rockport, where the player can glitch into point Camden near the Bay Bridge. Such glitches can also allow players to sneak into areas earlier than they are supposed to, or go to places that they are not supposed to go, such as entering beta areas in Grand Theft Auto IV by using a helicopter to clip through the ground and under the map. They are also exploited by speedrunners to engage in sequence breaking in games like Metroid Prime, which can cause them to behave abnormally especially if they have no code to address it.

In "out of bounds" areas, many maps have hollow objects that the player can move through freely. These objects usually are in the distance and are for decoration, lacking any collision detection. The floor or terrain can also likewise behave as if it were nonexistent, even though it is visible, causing the player to fall into a bottomless pit if walked upon. Depending on the game, after falling a certain distance the player will freeze, die, respawn on the map again or just keep falling. One example of players falling into a bottomless pit after glitching through a wall is a bug affecting a particular wall near the entrance to a temple in The Legend of Zelda: Ocarina of Time. Players can glitch through it, fall into a void and then respawn.

Many other glitches may also include background music being played at the time it was not intended to play, such as the Western Super Mario Bros. 2 (based on the Japan-only game Doki Doki Panic) has a glitch where the Subspace music (the Overworld background music from the original Super Mario Bros.) can be played outside of Subspace after the player becomes invincible and enters Subspace and leaves before invincibility drains away (this was fixed for Super Mario All-Stars and Super Mario Advance so Subspace music can only be played in Subspace).

There are also glitches that allow players to obtain a very high amount of resources just by trying to acquire negative values for certain resource counters that are not coded to handle them. One example of this bug is in the PlayStation 3 and Xbox 360 versions of FIFA 11, in which the game does not check for negative values for the player's currency counter, meaning that if a player cancels a loan and there is not enough currency available in the transfer budget, the currency counter will roll over back to the highest number, granting the player a large amount of wealth. Such glitches can hurt the competitive atmosphere of online multiplayer games. For example, there have been reports that the online multiplayer mode of Transformers: War for Cybertron suffered from hacking and glitches that allow players to manipulate classes and stats through methods not normally available to regular players.

Glitches can also affect the physics of particular games. A famous physics bug is found in Grand Theft Auto IV, in which a particular swingset can violently catapult anyone and anything that touches its chains or approaches its top bar for a great distance, due to coding flaws concerning the physics of the swing chains. Grand Theft Auto III and Grand Theft Auto V also have a similar physics bug where approaching certain closed gates would cause the player character or vehicle to be launched into the sky for a great distance.

There are also glitches that do not require any action on the part of the player, such as a glitch in NCAA Football 11 which will cause the football game to run longer than the time indicated on the clock and, most often, indefinitely.

• Circuit bending
• Glitch