is a decent Defender clone by Pumpkin Games, featuring 3D graphics but retaining 2D gameplay from the classic. Your objective in each level is to destroy all alien ships while protecting as many energy crystals as you possibly can.
The radar will be helpful to keep track of all the action, while power-ups appear rather frequently and can be collected for a temporary firepower upgrade. Fuel has to be replenished from time to time by hovering your craft over a fuel depot usually identifiable by it's red or pink glow. The game is now available as a free download.
Name: Alien Abduction
Developer: Pumpkin Games