New to Zombie Army 4: Dead War is the ability to upgrade your weapons, and doing so enables you to slaughter zombies with ease.
To upgrade your weapons you need to acquire upgrade kits, however, and you’re going to want a lot of them.
There are multiple ways to acquire upgrade kits in Zombie Army 4: Dead War. You’ll find one of them hidden in each chapter of the game. Look for little side paths or hidden rooms as you play through the game. Upgrade Kits are identifiable because of their bright green arrows pointing upwards. By bringing up the game’s pause menu you can see if you’ve picked up the upgrade kit hidden in your current chapter.
Upgrade kits can also be obtained by simply ranking up, getting gold ranks in missions, and completing chapter challenges. Bring up the pause menu at the start of each chapter to see what the challenge is. Filling Zombie Army 4: Dead War‘s sticker album rewards you with upgrade kits, too. Browse though it via the main menu to see what you need to do to obtain stickers. Most of them you’ll acquire naturally as you play through the game and horde mode.
Once you’ve acquired upgrade kits, apply them to the weapons you use the most often first. Fully upgrade a weapon, including the two upgrades that you must choose between, and you’ll then be eligible to master it. Once mastered, a weapon will boost the amount of damage done by that weapon’s type, be it rifle, secondary or sidearm. Don’t go expecting to master any weapons quickly though.