TITLE: Computer software for solving mixed strategy Nash equilibrium
QUESTION [10 upvotes]: Is there any computer software available for solving for mixed strategy Nash equilibria for two players given each player's payoff matrix?

REPLY [2 votes]: If you have Mathematica, there is a brute-force algorithm I authored. It is not efficient as the ones listed by Rahul Savani and it works well only for small games (say 4x4 or smaller). The only advantage is that if you are familiar with Mathematica you do not have to incur the cost of learning something new or install a system like Gambit.