The second was in a college gaming club. Unfortunately, there was some unwritten rule where you had to warn players their characters at risk. Ignoring the fact that I consider that the default assumption of most games except Toon, there was also the problem with a change in the meaning of terms between editions.
Anyway, I forget the name of the PS adventure trilogy I was running, but at the end of the 2nd module, the Gate Town of Ribcage is prepared for ascension. In Planescape, this means the Gate Town is going to become part of the plane it connects to. Apparently, in older editions, this meant that your characters are going to become gods and be removed from play.
I had no reason to know this, having come to D&D in AD&D2e, though I did have a chance to buy the Rules Cyclopedia really early in my interest in gaming. Anyway, I found out after trying to set up the third part of the adventure that I had lost my group because of their perception of the term. No amount of saying "it doesn't mean that anymore" convinced them to come back.
this sounds non-sensical. Planescape was a later 2E product. There was no prior art, so the concept of Gate Town and ascending in terms of Planescape was unique unto itself.
AD&D 1e or 2e had no "ascension" concept in the rules. D&D (as maintained by Rules Cyclopedia) had a concept the PC became a god at level 36. But that's a seperate game that a minority were still playing.
Walking out on a campaign with PCs that would "ascend" and end the game, still ends those PCs as the # of GMs willing to take on "external" PCs in the post 1E era of casual gaming was small. Basically, those PCs had more chance of game play WITH you, than walking out.
as such, there may have been another undisclosed reason.