Railroad

railroad; railroad, to; railroading, n., v. 1. (noun) an RPG scenario or adventure which follows a strictly linear plotline, denying players the opportunity to make critical decisions or act on their own initiative. 2. (verb) to railroad, to force players to follow a linear storyline. [GJ1]
 GM: Okay, you've defeated the Rakasha. The stairwell leads up into the Wyrm's Lair. 
 Player: Actually, I'm looking at our map, and we can avoid the Wyrm's Lair completely if we cut a hole in this wall. I'm gonna cast Stone to Flesh, and create an opening in the wall. 
 GM: Okay. The wall collapses on you, and you die. *to others* Now, what's your party order as you enter the Wyrm's Lair?