Zombie Apocalypse: Beneath The Surface

A browser-based top-down survival shooter built for a hackathon theme: Beneath the Surface.
You survive underground-themed zombie waves, unlock stronger weapons, and defeat a final boss to complete the run.

Play Live

itch.io: https://developer-parth.itch.io/zombie-apocalypse

Core Gameplay

• Fight increasing zombie waves in a large arena.
• Progress through level-based environment themes.
• Earn score to unlock stronger guns.
• Reach the final level, trigger the boss fight, and win by defeating the boss.

Complete Feature List

Combat and progression

• Multiple weapons with different damage, cooldown, force, ammo, durability, and unlock thresholds.
• Real-time shooting with projectile physics.
• Zombie AI pathfinding toward the player.
• Score system and kill rewards.
• Final boss with:
  • larger size/hitbox
  • higher speed
  • dedicated boss health bar
  • minimum hit requirement before death

Level and world systems

• Grid-based world with physics walls and walkable nodes.
• Visual tile themes that change by level.
• Background color themes by level range.
• Regen pod pickup that heals the player and refills ammo.

UI and UX

• Live HUD: score, level, zombies left, current weapon, high score.
• Goal table panel.
• Notification system (for level up, weapon unlocks, high score reached, boss spawn).
• Pause menu with:
  • Resume Game
  • Restart
  • Return to Menu

Persistent systems

• High score stored in localStorage.
• Home screen shows stored high score.
• Settings page includes:
  • Mute Music (global sound mute)
  • Reset High Score

Audio system

• Looping menu music across menu, gamemode, tutorial, and settings.
• Looping game music during gameplay.
• Looping win music on win screen.
• One-shot SFX:
  • shoot
  • reload pickup
  • gameover
  • menu/gamemode/tutorial/settings button clicks

End states

• Lose: redirects to gameover screen.
• Win: redirects to gamewin screen with return-to-menu option.

Controls

• W / ArrowUp: Move up
• A / ArrowLeft: Move left
• S / ArrowDown: Move down
• D / ArrowRight: Move right
• Space: Shoot
• E: Next weapon
• Q: Previous weapon
• Esc / T: Toggle goals table

Game Modes

You can configure mode from the Gamemode page using two switches: difficulty and god mode.

• Easy
  • Lowest zombie wave scaling.
  • Uses ZOMBIE_EASY_BASE_COUNT and ZOMBIE_EASY_INCR_COUNT.
• Regular
  • Medium zombie wave scaling (default progression pace).
  • Uses ZOMBIE_REGULAR_BASE_COUNT and ZOMBIE_REGULAR_INCR_COUNT.
• Hard
  • Highest zombie wave scaling.
  • Uses ZOMBIE_HARD_BASE_COUNT and ZOMBIE_HARD_INCR_COUNT.
• God Mode (ON)
  • You do not take damage.
  • All weapons are available immediately.
  • Ammo is effectively unlimited.
  • Bullet damage and durability are heavily boosted.

Run Locally

Install git if not already installed and run the following commands.

git clone https://github.com/Developer-Parth/Zombie-Apocalypse

cd Zombie-Apocalypse

yarn dlx serve

Open the served URL and start from index.html.

ENJOY THE GAME!!

Tech Stack

• HTML5, CSS3, Vanilla JavaScript
• Pixi.js (rendering)
• Matter.js (physics and collision)
• TweenJS (animation helpers)

Project Theme Fit

The game interprets Beneath the Surface as a literal underground survival experience: each level shifts environment style and pressure, culminating in a deep-run boss encounter.