Undead Invasion is a survival shooter game where you must defend a crumbling orphanage against waves of zombies. The game sets a tense pace from the start, forcing you to fight and reinforce your defenses to survive each day.
The gameplay mechanics revolve around three key pillars: defeating, surviving, and defending. You constantly move around the base, attacking zombies from a distance, repelling those who get too close, and building barricades before it's too late. The game flow feels natural, as every minute you have to alternate between:

The game features simple action-oriented controls, allowing you to react quickly without having to memorize too many keys.
The continuous combat rhythm forces you to combine both melee and ranged combat to keep your base safe.
| Tip | How to do it | Benefits |
|---|---|---|
| Prioritize upgrading your main weapon's damage | Focus on choosing upgrades that increase damage, fire rate, or armor penetration for the weapon you use most | Eliminate zombies faster, reducing pressure on the barricades |
| Always repair barricades when you have free time | Observe the barricades and repair them when the waves are sparse | Prevent zombies from breaking through, extending defense time |
| Use bombs for large groups of zombies | Press Numpad 1 when zombies are clustered near the structure | Clear large crowds, protecting the defensive line from being overrun |
| Switch weapons appropriately between different types of zombies | Use shotguns when zombies are close, rifles for distant targets | Optimize damage and conserve ammunition |
| Place traps before choke points | Build traps in narrow passages or areas where many zombies pass through | Inflict continuous damage and reduce the number of zombies you have to deal with manually |
| Maintain distance using kicks (Spacebar) | Use kicks when zombies get too close or touch the barricades | Create space for you to shoot or repair |
| Check random upgrades daily | Prioritize long-term buffs such as increased barricade health, reload speed | Create an advantage throughout the game |
| Utilize Playground Mode before starting a match | Try out traps, weapons, and barricade layouts | Reduce mistakes and build a more optimal strategy |
| Always reserve resources | Don't spend all your money on weapons, save some for repairing barricades on subsequent days | Maintain a stable defensive line, preventing unexpected collapses |
| Focus on movement instead of standing still and shooting | Shoot while retreating, change positions when needed | Avoid being surrounded and reduce damage taken |
Undead Invasion is a game that shows how the rhythm of survival changes significantly with just a few small decisions in maintaining the defensive line. Undead Corridor, on the other hand, creates a completely different feeling by placing you in narrow, high-pressure passages where every move carries inherent risks.
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