* double-jump
* power-slide
* wall-running
* ledge climbing
* 5-part tutorial and mini-campaign
* airboat rockets (similar to acolyte rockets in Titanfall 2)
* throw grenade button (with ability to "cook" grenades)
* new cheat modes (mario mode, exploding bullets, tougher citizens, extra enemies, the floor is lava)

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Mobility Mod Version 2 is out early!

Watch the trailer here:

Read the install guide here:


Download the release here:


What's New in Version 2:

  • Based on the Episode 2 Engine
  • Combines Half-Life 2, Episode 1, and Episode 2 into one mod (just keep scrolling on the chapter menu to get to the episodes)
  • New melee controls:
    • melee key for a quick crowbar attack
    • hold melee key and press secondary attack for a crowbar slash attack, which hits multiple targets and does more damage, but is slower
    • hold melee key and press primary attack for a rocket-boosted surge attack, which pushes you forward, hits as soon as the target is in range, and does a lot of damage.
    • Surge attack while in the air lets you fly a short time, or change direction. Surge attack while crouching will trigger a slide even if you weren't moving.
  • Very basic tutorial for the new melee
  • The airboat rockets seemed to please the personnel last time, so now there's a portable version. It's called the EGAR (Everyone Gets A Rocket!), and you can get it by typing give weapon_egar in the console.
    • Like the airboat rockets, it regenerates ammo.
    • Hold secondary attack to target enemies, and release to fire rockets.
    • Press reload to lock all remaining rockets onto the last target.
    • Unlike the airboat rockets, press primary attack to target whatever is under the cursor, even if it's just a spot on the ground.
    • A nice side-effect of this system is that if you hit primary and secondary attack at the same time, it fires one rocket at whatever you're looking at, so it's like a quake-style rocket launcher.
  • Movement enhancements:
    • Time-to-duck has been reduced, so sliding is much more responsive.
    • Console variable to lock direction while sliding, so you only slide in a straight line, no matter which way you're facing (set sv_slide_lock to 1)
    • Console variable to limit sliding, slide-jumping and wall-jumping to only boost you to sv_maxspeed. Normally these speed boosts are cumulative and not limited (set certain_restrictions to 1. I recommend this setting. It makes the game feel less crazy, and more consistent.)
  • lessclip - it's like noclip for invisible walls. Use with caution, because it turns out there are a lot of invisible walls and ramps that you need.
  • New HUD features:
    • artificial horizon (can be turned off or set to a custom opacity with cl_horizon console variable)
    • crosshair hit markers (diagonal lines. Can be turned off, set to a custom opacity with cl_hitmarkers, made bigger or smaller with cl_hitmarks_scale, faster or slower with cl_hitmarks_fadetime)
    • shotgun hit markers (circles showing hit pattern. Can be turned off or set to a custom opacity with cl_shotgun_hitmarks, can change the size of the circle with cl_shotgun_hitmarksize, can change the size of the pattern with cl_shotgun_hitmarkspread)
    • New grenade count display. In v1 there was a big row of grenade icons along the bottom, but that would clash with the vehicle locator display in ep2, plus it was a bit ugly.
  • Destroying an APC ejects the driver up into the air.
  • Unlocked a door in Nova Prospekt so that you can skip the first conversation between Alyx and Eli.
  • 'CONTINUE LAST SAVE' button on main menu - loads your last autosave.

Returning from version 1:

  • Wall-running
  • Double-jumping
  • Power-sliding
  • Ledge-climbing
  • Grenade button, ability to cook grenades
  • Unlocked Field-of-View (In HL2 the max was 90)
  • Tutorial and mini-campaign (only a tiny change from version 1, so if you played through it already, you're not missing anything if you skip it)
  • Reduced bullet spread of automatic weapons while crouching and not sliding
  • Louder, bass-heavy bullet impacts on hits (possibly too much so)
  • Cheat modes - exploding bullets, extra enemies, floor lava (just damage over time when you're on the ground), Mario mode, tough citizens
  • A whole lot of console variables to customise just about every aspect of the mod. Want to slide longer? Wallrun faster (or slower)? Jump higher? It's all configurable. Look in ep2_mobility/cfg/mobility.cfg.

Bugs Fixed:

  • driving the buggy over a cliff no longer crashes the game
  • fixed some near-clip problems when using high field-of-view
  • fixed mysterious rising into the air (if you started climbing, then turned away so that there was no space to move into, you would just keep climbing)
  • fixed voice lines in the tutorial being counted as music, and controlled by the music volume slider

Please make sure you read the install guide. Let me know if you have any problems.

But also let me know if you don't have problems. I love seeing people stream the game, or putting gameplay on youtube.

P.S. No it can't be compatible with MMod, sorry. It's a technical limitation, not a decision. I've been experimenting with other campaign mods, like Mission: Improbable and Dangerous World. I might have more to say about that another time. For now, enjoy the mod!


Version 2 is coming 20 April 2019

Version 2 is coming 20 April 2019

News 6 comments

Version 2 release announcement (release date 20 April 2019).

Fix for crashes after Feb 2019 Half-Life 2 update

Fix for crashes after Feb 2019 Half-Life 2 update


A (new) fix is available for crashes after the recent Half-Life 2 update.

Les Configurables

Les Configurables


Some info on how to use cheats, and other configurable aspects of the mod.

Up and Running

Up and Running


It's been a week or so since release, so I thought I'd thank everyone for their kind words and address some of the questions you've asked.

Add file RSS Files
[OLD VERSION] hl2_mobility_v1.0

[OLD VERSION] hl2_mobility_v1.0

Full Version 18 comments

[OLD VERSION] This is the complete release package for Mobility Mod version 1.0. It contains the modified Half-Life 2 engine and the gamedata for the...

Mobility Mod OST

Mobility Mod OST


Original music that I made for the mod and the trailers. These tracks are all included in the v2 release package under the 'sound' folder, but also here...



Full Version 14 comments

Full release package of Mobility Mod version 2.0. It contains the modified Episode 2 engine, and the original tutorial/mini-campaign. It does not contain...

Mobility Mod Version 2 Install Guide

Mobility Mod Version 2 Install Guide


This is the install guide for version 2.0 of Mobility Mod. The information is the same as in the description of the release.

[OLD VERSION] gameinfo.txt  - fix for Feb 2019 HL2 update (v1.0 only)

[OLD VERSION] gameinfo.txt - fix for Feb 2019 HL2 update (v1.0 only)

Patch 2 comments

[OLD VERSION - this fix is only required for v1.0 of the mod] (NEW VERSION 2 MARCH) Fix for crashes after Feb 2019 HL2 update. This is a replacement gameinfo.txt...

[OLD VERSION] MobilityModInstallGuide

[OLD VERSION] MobilityModInstallGuide

Guides 1 comment

Installation guide for Mobility Mod v1.0. A PDF document that explains how to install the mod.

Comments  (0 - 10 of 121)

will this ever be open source?

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If you make the 'clip_size' in weapon_pistol.txt -1, the pistol loads directly from reserve ammo.

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Hi, So I downloaded this mod(both versions the old one and the new one) they open, but when it gets to the half life 2 loading screen it blackscreens and crashes, Please help, I set my half life 2 to the beta thing, and installed the source sdk 2013 singleplayer thing, nothing seems to work. My pc is:
Windows 7 64bit
Amd Phenom 9650(processor)
Nvidia 710(graphics card)
4gb ram
and like 60 more gb space
Pls help, my steam is updated to the latest version tho

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MobilityMod Creator

Ignore the old version stuff. Just follow the v2 install guide. Half-Life 2 should be set to opt out of all betas. Source SDK should be set to the Upcoming beta. Let me know how it goes.

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It acutally fixed its self idk how, maybe that i installed skd singleplayer 2013 and prompted it to beta, and hl2 too, then restarted steam(also i added the game info text file for the fix)
I'm talking about the old one, and one last thing, do i need the episodes for the mobility mod v2?

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MobilityMod Creator

Yes, you need both episodes for v2.

Reply Good karma+1 vote

Random suggestion maybe? Would be to change the Airboat base model to have some sort of thing where the lock-on missiles come from... ya know? Just a thought of mine. Would be interesting to have as just an addon for Mobility Mod for those who actually would want such a model. (like me.) Also, Still enjoying the crap you can do in the game, just... too much fun really. More fun than the original games anyways.

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Also, another suggestion would be to find a way to add an infinite ammo command to the game (would honestly love to have such a command at my disposal.)

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Heres some suggestions for two new weapons:

// "Annabelle" //

I got this weapon after using commands to give myself the "weapon_alyxgun" right before Ravenholm. I removed it from my inventory and continued with the game, but when I got to the Ravenholm chapter- the part where you get the shotgun- I got the "weapon_annabelle" instead of the vanilla shotgun. But I just had to ent_remove that weapon and give myself the vanilla shotgun, wasn't a problem. Here is some information on possible stats and a possible way to obtain the weapon:

| Model: It should resemble a double barrel shotgun, but you should just use father Grigori's rifle's model.
| How to Obtain: It spawns next to where the shotgun spawns in Ravenholm. You just pick it up. Episode 1 & 2 spawns are up to you.
| Ammo Type: revolver/.357 rounds. Holds 2 rounds before the player has to reload.
| Damage: "Annabelle" does a lot of damage, being able to kill most enemies in 1-2 hits.
| Shooting Pattern: Unlike the vanilla shotgun, Annabelle only fires one pellet per shot, so the player must be very accurate.
| Accuracy & Recoil: "Annabelle" is very accurate, but if you fire as soon as the cooldown is over (after the first shot) it will be like 50% less accurate. The gun has a lot of recoil.

// Assault Pistol //

I found this while messing with the console. Here are some possible stats and a possible way to obtain the weapon:

| Model: There is already a model (weapon_alyxgun), but the fov of the weapon is VERY messed up, you'll have to fix that.
| How to Obtain: Up to you, I recommend placing it somewhere after the pistol but before the SMG.
| Ammo Type: Either Pistol or SMG rounds, or you could have it use ammo that slowly regenerates. Holds 40-60 rounds before the player has to reload.
| Damage: Does like 1/2 pistol damage, meaning fairly low.
| Shooting Pattern: Shoots like a regular pistol/SMG/rifle/whatever. Has two fire modes (which can be changed with right click): Automatic, where the weapon fires VERY fast, and Semi-Automatic, where the weapon fires once per click.
| Accuracy & Recoil: When in automatic mode, the weapon isn't too accurate, best for short & short-medium ranges. When in semi-automatic mode, the gun is much more accurate, as long as the player fires in short bursts. When in Automatic mode, the gun has quite a bit of recoil, like 5x the SMG. When in semi-automatic mode, the gun has little to no recoil.

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can i play v2 with out ep1 and 2 i only own hl2 it keep crashing to desk top

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MobilityMod Creator

No, you need the episodes.

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Highest Rated (2 agree) 9/10

Mobility Mod is really fun imo, it gives this pleasant feeling of speed and freedom of movement, it's really satisfying to see how the enemy AI reacts to you speeding from one spot to the other, flying over their heads, etc. But all it needs is melee/quick crowbar swing, since still having to stop and change weapons for a crowbar is really breaking the pacing, even more than it already used to in the base game. And maybe active slow-mo/bullet time ability would be a neat addition, allowing to perform…

Aug 29 2018 by Blue199


Latest tweets from @mobilitymod4hl2

Version 2 is out early. You can get it now. Moddb.com

Apr 19 2019

Trailer here. Version 2. T.co

Apr 17 2019

RT @_ArtIsAVerb: Soon! <3 First time you talk to it and see it build worlds with you, you can't help but feel like the 12 year old y… T.co

Nov 6 2018

Made a youtube channel. Just the trailer for now, but hopefully more to come soon. Youtu.be

Sep 14 2018

RT @ModDB: This mod adds Titanfall-insired wall running and crouch sliding to Half-Life 2 Moddb.comT.co

Aug 22 2018

Release Day! Come and get it! T.co

Aug 8 2018

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