This version of the game contains local multiplayer (keyboard/mouse + gamepad or 2 gamepads). The Steam version contains 3- and 4-player local multiplayer, and online multiplayer.
how do you play multiplayer on the same keyboard
You can't, sorry. At least one person needs a gamepad.
ok thanks and by gamepad what do you mean for example does a xbox one controller work
Yes, any gamepad that works with a PC.