How to Create Enemy Spawn System

Gameplay•Advanced•16 min read

Build a wave-based enemy spawning system with increasing difficulty and spawn points.

Step-by-Step Guide

Step 1:Create spawn points in your level

Create spawn points in your level. Add Position2D nodes where you want enemies to appear. Name them 'SpawnPoint1', 'SpawnPoint2', etc. Group them: Select all spawn points, right-click in Scene panel → 'Add to Group', name it 'spawn_points'. This lets you access all spawn points easily.

Step 2:Set up the SpawnManager

Create a SpawnManager autoload or node. Add variables: `var spawn_points = []`, `var enemy_scene = preload('res://scenes/Enemy.tscn')`, `var spawn_timer = Timer()`, `var wave_number = 1`, `var enemies_per_wave = 5`, `var spawn_interval = 2.0`. In `_ready()`: Get spawn points: `spawn_points = get_tree().get_nodes_in_group('spawn_points')`.

Step 3:Implement wave system

Implement wave system: `func start_wave():`, `for i in range(enemies_per_wave):`, `await get_tree().create_timer(spawn_interval).timeout`, `spawn_enemy()`. After wave completes: `await get_tree().create_timer(5.0).timeout` (break between waves), `wave_number += 1`, `enemies_per_wave += 2` (increase difficulty), `start_wave()`.

Step 4:Create spawn_enemy function

Create spawn_enemy function: `func spawn_enemy():`, `if spawn_points.is_empty(): return`, `var spawn_point = spawn_points.pick_random()`, `var enemy = enemy_scene.instantiate()`, `enemy.global_position = spawn_point.global_position`, `get_tree().current_scene.add_child(enemy)`. The pick_random() chooses a random spawn point for variety.

Step 5:Control spawning from game manager

Control spawning from game manager. In your GameManager: Call `SpawnManager.start_wave()` when game starts. Track active enemies: `var active_enemies = 0`. When enemy dies: `active_enemies -= 1`, `if active_enemies <= 0: SpawnManager.start_next_wave()`. Add difficulty scaling: Increase spawn rate, enemy health, or enemy types as wave number increases. Display current wave in HUD: `wave_label.text = 'Wave: ' + str(SpawnManager.wave_number)`.