I wonder how I can use this jet pack item in Half-Life. It's the orange helmet which can be found on every multiplayer map. Is there a hotkey to use it to make a long jump?
Like this: crouch first, then jump while crouching.
You could also use a keybind to use the jetpack with just one key on your keyboard. Add this lines into your steamapps\common\Half-Life\valve\autoexec.cfg. It will allow you to use the long jump by pressing “space”.
//jetpack / longjump alias alias "+lj" "+duck;wait;+jump" alias "-lj" "-jump;wait;-duck" bind "space" "+lj"
You need to pick up the orange helmet. Once you picked it up you will be able to make a long jump by pressing:
If you die in multiplayer you will lose this item and you need to pick it up again.