Sony announced that the online multiplayer feature of the PS4 will be available for free this weekend. This feature is usually only avaialble for PlayStation Plus subscribers.
Players without PlayStation Plus will be able to play online from the 13th of February at 6.00am GMT/7.00am CET until the 16th of February at 6.00am GMT/7.00am CET. This is the perfect opportunity for PS4 players that have yet to experience the online component of their games.
Sony confirmed that this offer is only for the online multiplayer and doesn't include other features of PlayStation Plus.