Users will be able to play the game's competitive multiplayer mode and level up their character to level 15.
Once users reach level 15 they can pay to continue their progress, with options to raise the level cap to 25 or remove the level cap entirely.
Users will still be able to play at level 15 without paying, though they will be unable to unlock new equipment or trophies that would require a higher level.
The game will still keep track of a player's experience and accomplishments if they do not pay, and will retroactively apply the experience once the user pays to raise the level cap.
Users will also be able to pay for add-on DLC to unlock the co-operative campaign, co-operative arena and survival modes, a split-screen option, and the existing Uncharted 3 DLC map packs.
It will also be possible to download the Uncharted 3 single-player campaign as DLC for the free-to-play multiplayer.
Uncharted 3 is Sony's second attempt at releasing a multiplayer mode as a standalone free-to-play game, previously doing the same thing with Killzone 3.
Sony revealed it will also continue to support Uncharted 3 Multiplayer with 40 upcoming DLC items which will arrive in groups based on different themes.
No pricing was given for any of the DLC content.
Uncharted 3 Multiplayer will be available free-to-play on PSN from today in North America and is launching on February 27 in Europe.
> Read Digital Spy's review of Uncharted 3: Drake's Deception
Gallery - images from the Uncharted 3: Drake's Fortune map pack:
Copyright: Naught Dog