Undead Invasion

Undead Invasion is a single-player zombie survival shooter with a side-on view and blocky visuals. Fight through successive days, then use the break between attacks to buy equipment and arrange your defenses. The enemies are computer-controlled zombies, not other players.

Shooting is only part of the challenge. Barricades and traps help protect the space you need to fight, while your limited budget must cover weapons, recovery and defensive preparation. As the waves become more demanding, a poorly prepared position can be as dangerous as a missed shot.

Spend Between Attacks

In Defense, surviving and defeating zombies earns money for the next preparation phase. Choose equipment that addresses your current problem: stronger firepower for a tougher wave, recovery when injured, or defenses when enemies are reaching you too quickly. Guns, melee equipment and protective gear give you different ways to handle pressure.

Keep a Usable Fighting Space

Place barricades and traps before the attack rather than relying on your weapon alone. Barriers can hold enemies back, and traps can punish zombies approaching your position. During combat, keep enough distance to aim and reload. A kick or melee attack can help when an enemy gets too close; explosives are useful against a tightly packed group.

Experiment in Playground

The separate Playground entry lets you experiment with equipment and defensive arrangements outside a normal survival attempt. Use it to compare a layout or weapon before committing your next Defense budget.

Common desktop controls are listed below. Use the current game's prompts if your version uses different bindings.

• A D or ← →: move left and right
• LRMove Mouse: aim
• LRLeft Click: shoot
• R: reload
• Q: switch weapon
• E: melee attack
• ␣ Space: kick

Use the on-screen preparation interface to buy and place defenses. Supported phones and tablets use touch controls; follow the buttons shown by that version.

• Buy for the next threat, not just the biggest gun. If enemies keep reaching you during reloads, a barricade or recovery purchase may help more than another weapon.
• Leave room to retreat. Arrange defenses without trapping yourself in a cramped position. A protected firing lane still needs space for you to move away from approaching zombies.
• Reload before the gap disappears. Take advantage of distance or a barrier while it still separates you from the horde.
• Use close-range tools to regain space. Kick or use melee when necessary, then reposition instead of remaining beside the next zombie.
• Save explosives for a group. Several enemies packed together offer better value than a single isolated target.
• Test one change at a time. Playground is useful for finding out whether a new weapon or a different barrier layout fixes the weakness in your last attempt.