Isolation

Round based shooter where you earn points by killing zombies to be able to purchase guns and upgrades in order to survive waves of incoming zombies. 

WASD - Movement

Left Click - Shoot

R - Reload 

U - Upgrade menu

1,2,3 - Switch weapons

Esc - Pause

In order to change the weapon you are buying ammo for press 1,2,3 while in the menu