It would be really cool if Gmod had a singleplayer campaign.
Imagine: You fight with your tools against random evil forces or you must solve puzzles with the help of some tools. There could be an aircraft mission, an epic war on the ocean, huge wars combined with an epic story.
Hmm, it is rather difficult to create this; but some maps could be the base, e.g. you start on Gm_construct.
Any other ideas to make a singleplayer campaign ?