Risk
20 Achievements
8-10h
PS3
Crushing Victory
Win a game in 10 turns or less
48.9%
How to unlock the Crushing Victory achievement in Risk - Definitive Guide
You can do this with 3 human players and only 1 controller. I found it very quick to do Capitals. Just place the other teams' capitals in a spot you can take on your first turn. When your turn comes up, just take over both of the other capitals.