Tank 90 (坦克大战 / Battle City Clone)

A faithful recreation of the classic Battle City / Tank 1990 (坦克大战) built in Unity. The entire game is constructed from code at runtime — the scene only holds a GameManager object and the main camera.

Requirements

• Unity 6000.4.10f1 (Unity 6.4) — open with this exact editor version for guaranteed compatibility.
• Render pipeline: 2D + URP (Universal Render Pipeline)
• Input: New Input System only (Keyboard.current); the old Input Manager is disabled.

How to Run

1. Open the project in Unity 6000.4.10f1.
2. Open the scene Assets/Scenes/SampleScene.unity.
3. Press Play, then press Enter at the title screen.

Controls

Action	Keys
Move	Arrow keys / WASD
Fire	Space / J (hold to fire continuously)
Start / Restart	Enter

Features

• Player tank with 4 upgrade levels (faster bullets, double fire, steel-piercing shots).
• 4 enemy types — Basic, Fast, Power, Armor — each with distinct stats and AI.
• 3 stages with destructible brick, solid steel, water, trees and ice terrain.
• The eagle base: lose it and it's game over.
• 7 power-ups: Helmet (shield), Timer (freeze enemies), Shovel (fortify base), Star (upgrade), Grenade (clear screen), Life (+1), Gun (max upgrade).
• HUD with score, stage, lives icons and a remaining-enemy icon grid.
• Explosions, spawn-stars, score popups and shield effects.

Project Layout

Assets/
  Scenes/SampleScene.unity     # holds only GameManager + Main Camera
  Resources/GeneralSprites.png # spritesheet, loaded by name via SpriteLibrary
  Resources/Miscellaneous.png  # title-screen art
  Scripts/
    Core/      # SpriteLibrary, GameConfig
    Tanks/     # Tank, EnemyTank, EnemyAI, PlayerController, TankMotor, TankFactory
    Combat/    # Bullet
    Terrain/   # WaterTile and tile markers
    Effects/   # SpriteAnim, Effects (explosions, popups)
    Level/     # LevelData, LevelBuilder
    Managers/  # GameManager, EnemySpawner
    Items/     # PowerUp
    UI/        # Hud
docs/
  SPRITE_MAP.md                # spritesheet sub-sprite naming & coordinates

Conventions

• World scale: 1 cell = 1 unit (PPU 16), sub-tile = 0.5 unit. Field is 13×13, centred at (6, 6).
• Layers: Wall = 8, Tank = 9, Bullet = 10.
• Namespace: Tank90.
• Sprites live in Assets/Resources/GeneralSprites.png and are loaded by name through SpriteLibrary (full mapping in docs/SPRITE_MAP.md).