Combat Systems for Roblox Games

Introduction

Combat is one of the most requested scripting topics in Roblox development. A good combat system feels responsive on the client while keeping all damage calculations authoritative on the server. This hub covers hitbox detection, damage pipelines, status effects, and anti-exploit considerations.

Hit Detection Methods

Region3 checks, raycasting, and GetPartBoundsInBox each suit different combat styles. Melee weapons often use short raycasts from the weapon attachment. AOE attacks use GetPartBoundsInRadius. Projectile weapons raycast along the bullet path. Choose the method that matches your game's fidelity requirements and performance budget.

Server-Side Damage Pipeline

Client sends attack intent via RemoteEvent. Server validates: is the player alive, is the weapon equipped, is the cooldown expired, is the target in range? Server calculates damage with modifiers. Server applies damage to Humanoid.Health. Server fires visual feedback RemoteEvent to all clients. Never let the client report damage dealt.

Use Cases

• Fighting games
• RPG combat
• Boss battle systems

Best Practices

• Validate range and line-of-sight server-side
• Use integer damage values to avoid floating-point exploits
• Implement invincibility frames after hits

Troubleshooting