What else can you do with some DOS installed besides look cool and use the 3 by 5 digital index cards program?
Well you could have a little fun!
The game Maze Wars came out in 1992 for DOS. There is some speculation it may also have been called War Games in a Maze. What is remarkable is that the game requires mouse controls to play. You have to have mouse.sys in DOS setup to control what is basically an early first person style polygonal game.
You can get the floppy disk image here: