I'm looking for a Book where RPG characters are portrayed as real. Then at the end it shows that the RPGers are being played by another nested reality of RPGers and there is a bomb in the room.
Other random memories:
- One RPG character winds up wounded and with centaurs.
- An RPGer tries to scratch off a river hexagon with a butter knife but it refills.
- One RPGer tries to quit but his car won't start for him to leave.
I don't have much else. The cover was blue and showed a basket being lifted into the sky. And I keep googling game end etc. (it's not Ender's game!). I only remember those few scenes and that it's old (80s, maybe as late as 90-92 but I don't think so).