If you feel the zombie mode in Counter Strike Source is hard to kill a zombie or avoid them, follow the simple steps below

Go in a room make sure there are chairs or something big like chairs.

Make the chair stand up at the entrance of the room cover openings.

When a zombie come and keeps trying to get in this is very hard so try to shoot the chair at the zombie until the chair squishes the zombie.

Done! Just make sure the chair squished the zombie.

Note

Its easier to do this when the room youre in is near stairs but make sure the zombie is going up the stairs to get you if it does shoot the chair till the zombie squishes to the wall.

Make sure your teammate isn’t behind the zombie; you might squish your teammate too!