Hi, I was creating a custom game earlier and noticed many of the weapons and utilities such as mine strikes and jetpacks, low grav etc are missing when creating a custom local MP game.
Is it possible to unlock or add all these weapon options to the game without playing the full wormage mode?

Thanks

No, as the WWP hasn't been updated with support for super weapons in scheme, so you can't prescribe them there.
There's a editor for schemes btw: http://worms2d.info/SchemeEddy

Legend!
Thanks for linking the editor - even better than I had hoped :)