Tweet Defense, the Twitter-connected tower defense game, is free today courtesy of the always reliable (and reliably free) FreeAppADay.com It's usually $3 for iPhone and $8 for iPad, so grab both and buy a loved one $11 in flowers. [JoyStiq]
Tweet Defense HD, the iPad version of the popular iPhone game, looks as fun as the original. The only difference is that now the zombie-filled tower defense game is made specifically for the iPad. And a bit pricier.
The premise of Tweet Defense is simple: The more you tweet and the more Twitter followers you gain, the stronger your tower defenses will be. Clever, though hopefully RT bonuses will come in the future. $1. [iTunes via Kotaku]