used to play alot gmod in the past
a few mates and i got our own server running with spacebuild (simulates O2, temperature etc. - you cant live in outer space without a spacecraft or a suit) and anything...
after just a few hours we had pretty decent working (and awesome looking) contraptions.
few examples:
full lifesupport space shutte with teleporting-ability (hyperdrive <3)
spacemines -
basically a flying ball with a fusion charge (homemade) in it with quite a lot wired stuff. what it did: standing cloaked on a static position in space, waiting for any player to pass. sensors find the enemies ship, a dozen spikes propell off the surface of the mine within any direction.
contact with the ship enables a grabber which connects mine + ship (strange part of gmod physics - you have to link a structure to the explosive to tear it apart completely). BOOM!
just sit back and enjoy the fireworks.
and an idea we got working that i had from a book: transform cannons
small thermonuclear warhead gets teleported to the point the cannon is pointed at, e.g. a ships wall. BUT with some programming the bomb teleports to a point 1 gamemetre BEHIND the point the cannon is pointed at.
god it was fun scaring mingebags with that....
also: flying sofa ftw!