Overview
What exactly is Accelerated Back Hopping?Accelerated Back Hopping (ABH for short) is a Glitch, and it’s the main method of movement on OrangeBox Engine-based games. ABH replaces Bunnyhopping, which was fixed in the OrangeBox Engine. It is also significantly faster than bunnyhopping. This glitch lets you jump backwards at exponentially high speeds. It works on Half Life 2, Episode 1-2 and Portal.https://youtu.be/vdNYggZr5nMThere are three forms of ABHing Accelerated Bunny Hopping Accelerated Forward Hopping Accelerated Side HoppingHow do I get started?There are two methods of using ABH, Using an AutoHotKey script or binding Jump to your mousewheel.AutoHotKey method1. Download and Install AutoHotKey, you can find this on Google as I can’t link downloads unfortunately.2. Right click an empty space on your Desktop, hover over New and go click on “AutoHotKey script”, this will make a .ahk file on your dekstop.3. Rename it to whatever you want.4. Edit the .ahk file with Notepad or any other note editor5. Copy and paste this into the .ahk and save.*SPACE::
Loop
{
GetKeyState,state,SPACE,P
if state = U
break
Send, {Blind}{SPACE}
Sleep,10
}
return6. Open it7. Tada!Mousewheel methodNote: This method is a bit harder than the AHK method.1. Start Half-Life 2, Episode 1-2 or Portal.2. Click Options and click on Keyboard and then click Advanced.3. Check “Enable developer console” and click OK, then click apply.4. Press the tidal key (`) on your keyboard, a console will appear.5. Type these two commands one by one.bind mwheelup +jump, bind mwheeldown +jump6. Close the console and Tada!You are ready! Open the map!Now, if you used the AutoHotKey method, you can hold space and it will jump automatically. If you use the mousewheel method, you have to jump with the mousescroll.AutoHotKey guide1. Load the map.2. Run/walk forward then crouch jump (hold space) then look backwards and hold space.3. You should be past the speed of sound now! Congratulations 🙂 Mousewheel guide1. Load the map2. Run/walk forward then crouch jump (with the mousewheel), and look backwards, and repeatedly scroll up and down on the mousewheel. It’s a bit hard so it could take some attempts.3. You should be past the speed of sound now! Congratulations :)Accelerated Forward HoppingOnce you’ve gained some speed while ABH-ing, you can turn around and start pressing S every time you jump. This will make the game think that you are traveling backward and so it will try to decelerate you by applying force the direction you are facing, so you still gain speed.In Half-Life 2, this is very hard to do because you can only press S in a short window of time. Holding S will result in a complete stop because you are deliberately slowing yourself down. However in Portal, because air control is significantly reduced, you can hold S to execute the trick.https://www.youtube.com/watch?v=oNzegyOtXFcAccelerated Side HoppingThis variant of ABH allows you to look forwards similar to AFH. To execute this, start an ABH but instead of turning around in the air, adjust your view slightly to the left (or right) and hold S and D (or S and A) to gain speed. Unlike AFH, if you are ASH-ing close to the ground, you can hold your inputs and adjust your aim accordingly to consistently do the trick. However, if you’re in the middle of a launch, releasing your inputs is recommended in order not to disturb with your jump and to allow better maneuverability while you’re in the air.https://www.youtube.com/watch?v=Lrnp88Dq7TUSources: SourceRuns, Speedrun.com, r/speedrun.