Zombies from classic mod

In "Zombies from classic mod" you will find a unique battle for survival! Combine identical zombies to create new, stronger mutants. The higher the level of your creatures, the more powerful the army and the higher the chance to repel enemy attacks. Plan every action: combine, strengthen and develop your army to cope with waves of opponents. Upgrade your strategy, open new zombies and prove that your horde is invincible!