You have to hit baseballs at the oncoming Zombies to get them out. Make to the next level by knocking them all off their feet. You can swing using the 'A' Key.
Fend off the zombie attacks, use the money you earn on upgrading your defensive capabilities. Use the WASD (Arrow keys) to move around. Aim and fire with the mouse. R (Page down) to reload your weapon. Q (Del) and E (End) to cycle through the weapons. To repair a barricade stand close to it and press F (Home). Press space (Page up) to enter the upgrade menu.
Use the WASD of arrow keys for movement. Aim and shoot with the mouse. The mouse wheel or E and Q keys are for changing weapons. R or Num 0: reload weapon. P: Pause game
There are lots of zombies surrounding you. Kill the zombies before they kill you! Use arrow keys to move, space-bar to shoot, shift key for a grenade.
Use the arrow keys to move. Shoot: Space bar. Next/Prev Weapon: [Z] and [X]. Select weapon directly: Number Keys.
Watch out for the zombie squirrels!
Even the undead enjoy a quick snack. Serve up grotesque meals for your zombie customers! Would you like fingers with that?
You are goign to have to go through your missions shooting all the zombies and trying to do whatever necessary to get to the professor and the check points, good luck!