Commonly used in tile-based games, tile masks let you change a tile depending on its neighbours, allowing you to blend terrains, replace tiles, and more. In...

Most collision detection in computer games is done using the AABB technique: very simply, if two rectangles intersect, then a collision has occurred. It's...

Shooters and games that use particle systems have to create, manipulate, and then remove many objects at once - maybe even hundreds per frame. This can lead...

Sometimes even a simple set of basic rules can give you very interesting results. In this tutorial we'll build the core engine of Conway's Game of Life from...

Soft body dynamics is about simulating realistic deformable objects. We'll use it here to simulate a tearable cloth curtain and a set of ragdolls that you...

Many games require the use of collision detection algorithms to determine when two objects have collided, but these algorithms are often expensive operations...

You're never too old for a game of Spot the Difference—I remember playing it as a kid, and I now find my wife still plays it occasionally! In this tutorial,...

Intelligence, Willpower, Charisma, Wisdom: besides being important qualities you should have as a game developer, these are also common attributes used in...

Sploosh! In this tutorial, I'll show you how you can use simple math, physics, and particle effects to simulate great looking 2D water waves and droplets.

Your game has data - sprites, sound effects, music, text - and you need to store it somehow. Sometimes you can encapsulate everything into a single SWF,...

The Separating Axis Theorem is often used to check for collisions between two simple polygons, or between a polygon and a circle. As with all algorithms, it...

In this tutorial, we'll implement fully destructible pixel terrain, in the style of games like Cortex Command and Worms. You'll learn how to make the world...