In a surprise move, Sony has unlocked the God of War: Ascension multiplayer beta for everyone with a US PlayStation Network account.
The beta will remain live and open to all in US until midnight on Monday Pacific Time (January 22, 12:00am PST), leaving you plenty of time to get involved if you haven't already.
To get into the beta you must redeem the following code via the US PS Store:
F2TA - HMNB - 762G
Sony also announced this weekend that a God of War: Ascension demo will be released in 'late February' offering a playable slice of the single-player campaign.