How To Split-Screen Borderlands 2 On A Single PCS  Borderlands 2
is a game that lives by its co-op—it's fun to play the game
solo, but it's even more fun to play with friends. It's even
more fun to play with a friend in the same room.  The PC version
of the game is truly fantastic, with great graphics, snappy
load-times, a ton of tweakable options and a much-improved
interface. But it doesn't allow for split-screen co-op—if you
wanted to play with friends, you had to do it online. Well,
until now.  Over in the official Gearbox forums, user Sycdan has
posted this thorough step-by-step guide to playing the PC
version in split-screen. It involves installing sandboxie,
IndieVolume (which costs money but which you can try for two
weeks for free), and running the game in windowed mode. You'll
also need two controllers that your PC recognizes, naturally.  I
haven't tried this, as I mostly live a sad and solitary video
game life, but the whole thing looks viable, if a bit hacky.
Given the way that Steam's big-picture