Bunnyhop

Bunnyhopping (also known as bhopping) refers to a movement exploit found in several Quake Engine, GoldSrc and Source Engine games

Originally found in Quake, Bunnyhopping allows the player to achieve speeds far higher than running regularly, and is used heavily by speedrunners to complete levels faster.

How it works

Bunnyhopping is performed by timing a jump so that it inputs the same tick that the player lands on the ground. Doing so preserves their speed.

Air-strafing is done by using a directional key while moving the mouse in the same direction (i.e, moving left while turning left), which builds speed while in the air.

Both of these combined allow for the player to gain a ton of speed as long as they keep timing their jumps correctly.

Binds

Many players reccomend binding the scroll wheel to jump, as that makes the timing much easier than hitting a single key normally

In Source, open the Console and use

bind mwheelup +jump;bind mwheeldown +jump;bind space +jump

to bind Jump to both mousewheel directions and Space

Scripts

The player can also choose to use Scripts to automate bhopping, though in some multiplayer games this can be considered bad practice and/or cheating, and may lead to the player being banned (whether by server admins or by Valve)

Speedruns of multiple GoldSrc and Source games have categories that allow/disallow runners from using Scripts.

Attempts to stop bhopping

Over time, Valve has attempted to minimize or stop players from bunnyhopping, with mixed results

In Half-Life 2 and Portal, the game will attempt to slow down the player if they exceed a certain speed. It does this by applying a backwards force to the player, but because of an oversight, the game applies this based on the direction the player is facing instead of the direction they are going. The player can abuse this by turning around and bhopping while facing backwards, applying the force and adding to their current velocity. This is referred to as Accelerated Back Hopping (or ABH for short)

Later games on the The Orange Box engine branch or newer would implement more fixes to make bhopping harder and less effective, though still not impossible.

Gamemodes

Several multiplayer Source games, such as Garry's Mod and Counter-Strike: Source, have some servers dedicated to a Bhop gamemode (Garry's Mod even having a category in it's server browser for it). These servers will typically feature maps designed as courses for players to race through, with plugins to track time, speed, and other information. These servers will also usually change certain cvars to change how the player controls while bhopping, such as sv_airaccelerate.

Media

Phoon: Too Much For zblock, one of the most popular CSS Fragmovies with 11 million views on it's reupload

See also

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External links

Bunnyhopping on Sourceruns wiki

Accelerated Back Hopping on Sourceruns wiki