Random ideas you never saw through

[Creamsteak]

I think making open ended time travel work is possible, but you need to fortify your defenses a bit more to preserve the game. I think, almost as a matter of necessity, you need to make sessions a bit short, so that you never alter too much in one sitting. I don't know about everyone else, but I need time to really consider the reprecussions of some actions in my campaign in this scenerio.

Some in game mechanics help too (make the traveling delayed, like the "machine" only works once every 30 days).

 

[Evilhalfling]

A "Lest Darkness Fall" inspired game where one character slips back through time and tries to prevent the fall of the golden age empire. A one shot, its time may still come.
the pregen characters include a Wyrmling silver, orginally destined to rule the area 300ish years later, and a Wizardress based on Einstien, who independently invents wizardry, while working as a book-binder.

As a one-time event, I am willing to rewrite my world's history based on the events. However, events will try and fight being changed, and only the actions of the traveler (including swaying PCs to his cause, or saving a PC's life) can have any meaningful impact.

A muscian group D&D campaign,
An aztech campaign/one-shot,

 

[Allegro]

A campaign based on the beginning of the French republic. I'd have the PCs start as monarchists and witness some of the atrocities of the monarchy. They would have the choice of sides at that point.

 

[Drowbane]

que the Imperial March!

I bought the original SWd20 book when it came out and that week I had this dream of AT-AT walkers approaching a walled city I just knew (in that sort of dream-knowing-thing) was Waterdeep...

edit: so I'm not the only nutjob wanting to blend some SW into his D&D once in awhile. Also back in 3e, I did convince a DM to let me play a Halfling Jedi Guardian in a normal party... as a sort of variant Psi-knight. My saber worked as SW but looked low-tech and could only be activated by expending vitality.

 

[Whizbang Dustyboots]

I dropped a ton of hooks about the Mysterious Fey Kingdom in the Northern Woods in my Midwood game, and it's totally failed to capture anyone's imagination. So it'll be left for some sequel series. I had some good stuff planned, but it can wait for another game, set in a different nearby community, some day.

 

[The Grumpy Celt]

Having a couple of Borg cubes show up and as-laminate Romulus.

 

[Corbert]

Some in game mechanics help too (make the traveling delayed, like the "machine" only works once every 30 days).

I had this with a "Time Temple" in a past campaign. You could only travel exactly 100 years forward of backward in time, so you would be unable to meet your past self. It worked in my game because it was based on DnDChick's Furries and Fantasy: The World of Fauna. http://members.aol.com/countrygrrlhere/faunad20.htm