What happens when you take the typical Tower Defense formula of building defenses along a maze crawling with enemies, and turn it on its head? While most developers would put out such bold claims and end up with yawners, the guys over at Pixel Federation will have YOU as the one attacking and taking over towers in their latest Nintendo DSIWare game, Libera Wing.

That actually sounds pretty smart.

The premise of Libera Wing is set within a 3D comic, sci-fi environment. The background story is that an alien attack from outer space threatens  the Earth Union’s space stations. The Union’s elite squad – Libera Wing – is sent out to protect the Union from alien aggression and regain control of the lost stations.

What’s unique about Libera Wing’s gameplay is that it is divided into 2 phases. Each level is played twice with the first phase, known as the attack phase is used to recapture the space stations. The second phase involves defending them against wave and wave of aliens.

The phases highlight the use of the player’s fleet, used to attack occupying alien forces and to defend from the waves of aliens. Bolstering the player’s efforts are the use of items.

Check out the following screenshots from the game: