SOCOM 4 is set to release in just over a week, and its massive online multiplayer and extensive campaign mode is not all that you will be getting if you pick it up. Sony announced today that specially marked boxes of SOCOM 4 (most likely meaning the first few shipments) will include a voucher to gain early access to Insomniac Games' upcoming shooter, Resistance 3. This voucher can be found in both the standard editions and "Full Deployment" editions of the game, so nobody is left out in the cold.
Just make sure that your copy of SOCOM 4 has the special logo stating it contains the Resistance 3 beta, otherwise, then you would be out in the cold.