The tower defense genre is immensely popular on iOS and has produced some smash hits like Plants vs. Zombies and Fieldrunners. This tutorial walks you through the process of creating a tower defense game step by step. You'll learn game mechanics, art style and how to use Unity Prefabs. Best of all, it's in 3D.
So, you've created a cool 2D game and it's fun to play. But hard to aim. How can you help your players aim? The answer is auto-aiming and this article demonstrates a simple approach that you can use in your own games.
Game development can involve a lot of math and this tutorial by Nick Lockwood is an excellent review of that math. After helping you refresh your trigonometry, it will explain how you can use the math to calculate acceleration, velocity, collisions and smooth out rotations. This is worth a read and is definitely more fun than high school math class. Anybody? Bueller?