Opening a EXE file from a Unity game

The game I built is on a different program. The game is divided into many EXE files. I need to know, how do I make a game menu in Unity where I can open different EXE files on a 3d menu.

Running an application from within Unity is fairly simple, and is provided to you through the .NET framework.

System.Diagnostics.Process.Start("myapplication.exe");

For reference, here is the MSDN link: