http://www.psnstores.com/2010/06/e3-slambolt-scrappers-announced-for-psn/
Players will reach for the sky and build the greatest towers in Slam Bolt City while defending against deviously charming baddies and epic bosses. The game features 4 way co-op and head to head multiplayer, and boasts a simple yet surprisingly deep competitive battle mode.
It is being published by SOE so this is probably a PSN exclusive. Described as "Reverse Rampage"