At the start of each level, you begin with a base combo of x1. As you eliminate zombies using weapons other than the basic pistol, your combo increases based on your performance with that weapon. This combo value accumulates and contributes to your overall score throughout the level.

Your active combo can be seen at the top left corner of the screen.

The combo multiplier resets at the start of each level, providing you with fresh opportunities to unleash devastating combos!