To celebrate the release of its squirrel-starring arcader Nuts! Limbic Software is rewarding us all with a bonkers bargain.

Both the Silver Award-winning TowerMadness and its PG Readers' Choice Award-bagging brethren TowerMadness HD are free for the day.

That amounts to a jaw-dropping saving of £1.79 / $2.99 / €2.39 on the iPhone version and a discount of £4.99 / $7.99 / €5.99 on the iPad game.

Seeing as we declared it'd be "madness to miss this game" on review in October 2009, well, you'd have to be stuck in a bear trap to overlook these tower defence titles today.