Frequently Ask Questions
Find quick answers to common questions and learn how to get the most out of our games.
Simply drag two identical units together to combine them into a stronger version. Merging increases their stats and helps you withstand tougher zombie waves.
Focus on upgrading your unit tiers and unlocking new soldier types. Higher-tier units provide better damage, improved defense, and faster wave clearing.
Each wave scales with your current progress. As you merge and upgrade units, the game introduces tougher zombies to keep the challenge engaging and rewarding.
Yes, progress is stored securely and can be accessed across supported devices.
Most of our titles are free to download with optional in-game purchases.
