This achievement will need to be boosted since nobody plays this game online.
For this achievement, you will need a total of 3 human players (up to 5). The first two players to join the game (that is, the host and the next person to join) will not be able to get this achievement.
In the first round, only the two main players (the ones in the front row) will be able to answer. Starting in the second round, anyone can ring in. So if you're a spoiler (you're on the back row) ring in and hope nobody else rings in. Answer correctly and you can move up the the front row, replacing one of the original players. The achievement unlocks immediately.