Grav Gun Rocketjumping In HL2 Mod Transmissions

Zapping Combine soldiers with the supercharged gravity gun was a right lark, a fine moment in Half-Life 2. Today I’ve been larking around with a different type of turbo gravity gun in a new mod, and I think I prefer it. See, it lets me ‘rocketjump.’

HL2 mod Transmissions: Element 120 [official site] is a short singleplayer mod introducing a new zapgun. It blasts balls of concussive force that send enemies and physics objects flying (and its levels are heavy on blastable props) and, of course, you. Look down, jump then blast a ball, and go sailing through the air like a beautiful murderous butterfly.

Transmissions is a whole mini-campaign of its own. I almost stopped early on, not enjoying more dingy HL2 tunnels with turrets and traps and wheels to turn and horrible black headcrabs, though one puzzle about darkness was neat. Then I found the super zapgun, or Zero Point Energy Projector to use its proper name, and was delighted.

I hadn’t realised quite how much I’ve missed rocketjumping. Flinging myself across levels was grand, bouncing up and bursting through windows. It’s a nice bonus that you’ll also leave a trail of destruction as conveniently-placed objects near you will bounce and roll around crushing enemies.

The campaign’s short (less than an hour) but has two great large combat setpieces in large arenas full of places to gravjump around and plenty of physics props to blast at enemies. The second one, especially, has loads of destructible environment bits to trash. It’s jolly exciting.

Impressively it’s all the work of one person, who goes by the name Shokunin. You can download Transmissions free from these here mirrors. It’s having a crack at Steam Greenlight too.


  1. Cerzi says:

    Quake-style rocket jumping is one of the few remaining awesome-but-forgotten 90s game mechanics left to be kickstarted back into the mainstream. It’s only a matter of time, and I look forward to it.

  2. clockworkrat says:

    Nice timing on the music and GMan clips.

  3. Kaeoschassis says:

    I wonder if you’ve tried Push, the doom mod by the same guy that made demonsteele? If you’ve missed rocketjumping you absolutely owe it to yourself to try. It’s genuinely the thing that’s got me back into the multiplayer side of the doom community. Movement was always what made 90s style shooters so great, and Push absolutely nails it.

    link to

    I believe the server may be down right now, alas, since the new version of zandro just came out and basically broke everything, but yeah, can’t recommend this enough. SO much fun.

  4. Jericho says:


    I will now take this time to ask who remembers such classic Half-Life mods as Rocket Crowbar, Sven Coop, and Science and Industry?

  5. muira says:

    Ha! April fooelz!

  6. Shokunin says:

    Hello, I’m the mod creator, Shokunin. Thank you so much Alice for the feature & review. Sorry things dragged a bit for you in Chapter 1 but I’m glad you finished it and enjoyed it! :)

  7. LTK says:

    It was short, but I enjoyed it. Those striders seem to be somewhat near-sighted though. Using the force gravity gun in combat felt kind of unwieldy but fortunately the regular weapons do the job well enough.