The content is split into two parts: a free patch and paid content from the Playstation Store.
The free patch, 1.5, will add a new multiplayer mode (Meltdown) and a new difficulty level in co-op mode. The patch will also allow a local co-op player to sign with their PSN, saving accumulated scores.
The new map packs, which are part of the paid content will allow for more "intimate battles" on a smaller scale. The map pack, titled "Aftermath" will cost $5.99. There are also a few skins available at $0.99.