Sam Fisher has become one of the most well-known names in video games, but due to his debut game appearing first on the Xbox he's less of a celebrity amongst PlayStation gamers. Splinter Cell Double Agent for PS3 has arrived a good few months after the Xbox 360 release, but that extra time hasn't resulted in a game that is likely to impress new PlayStation 3 owners.

Double Agent will feel rather familiar to anyone who's dabbled with previous Splinter Cell games, but there is one major new element to Double Agent that makes you consider each and every action you take in the game. As the game's title suggests, Sam goes undercover, and to remain undercover he needs to be trusted by his employer (the NSA) and by a terrorist group known as the JBA. Each objective in the game has an impact on how each side trusts you, and this forces you to think in a completely new way.

Failure to perform a certain task could end your mission there and then, but your actions have a more far-reaching effect on things. Say you finish a mission with the NSA on your back, after failing to plant a virus on a computer system or something equally spy-like; this not only hurts your rating for that mission, but carries over to the next. Starting off a level with a low trust level from either party will basically mean that you have to play the mission by the book, with slip ups being very costly indeed. It really is a rather unique gameplay mechanic and sets Fisher's latest outing apart from the rest.

As ever, gameplay is focussed on stealth and not action. The key to success in Double Agent is to remain unseen and to take people out as quietly as possible. Not only will this keep you alive, but it'll help you complete a number of extra objectives during each mission. The best way to deal with enemies is to sneak up on them, grab them, and then smother them or crack them over the head, but if you need to you can fall back on guns or a rather brutal up close and personal knife to the gut. Killing rather than knocking out enemies will more often than not hurt your trust ratings, but the option is there if you think it's worth the risk or if you're told to kill.

The visuals have taken a pretty big hit over the 360 game

Gadgets once again play a part, and successfully completing certain objectives will unlock new items for use in the game; you'll get hold of the usual bunch, such as sticky cameras and enhanced vision modes. One of the most useful gadgets is worn on Sam's back, and indicates how visible you are to enemies. Green is obviously safe, yellow is getting a little close for comfort and red means someone's going to be firing at you very soon. The enemies are all excellent shots, so unless you get to cover very quickly, a red light almost always means mission over. Sam also comes equipped with a handy watch (complete with 3D map), and an overhead map of the area, which marks enemy locations when you stand still.

Numerous levels take place at the JBA HQ, and these sections of the game throw numerous sneaky objectives at you, which need completing within a strict time limit. Once again you'll be required to remain trusted by both parties, and in a building full of terrorists, this isn't easy. Simply wandering into a secure area will set alarm bells ringing in the mind of anyone who happens to spot you, and trying to keep out of sight while in a hurry is something that takes more than a little trial and error. These levels certainly have a different feel to the usual Splinter Cell gameplay, and throw up some very interesting challenges and moral decisions.

If there's a weakness to the single-player campaign it's the story. Sam goes to prison and his daughter is killed in a car accident, but this is all covered in a tiny intro after the first level - there's no real emotional involvement. Given that the whole premise of the game is about making hard decisions, the weak storytelling is a real letdown and makes you feel rather disconnected from Sam and the actions he takes. The JBA HQ missions do give you a neat insight into what's happening inside the terrorist organisation, but there's still room for a lot if improvement.

The core game is still highly entertaining

So, everything is very much as it is in the Xbox 360 release, but in terms of presentation this PlayStation 3 version is severely under par. Whereas the Xbox 360 game often dazzled with impressive lighting and a solid frame rate, the PS3 game chugs frequently and seems to be missing much of the subtle lighting that impressed so much last year. What's more, numerous sound effect glitches crop up throughout and cutscenes fail to run smoothly. It's all rather sloppy and lessens the experience substantially.

Multiplayer has played a part in the last two Splinter Cell games, and the Spies Vs. Mercenaries gameplay returns, but it's been changed a fair bit. The biggest difference comes from how each class controls. The spies have become almost monkey-like, able to throw themselves around, clinging to ledges and pipes as if they've got a tail they can use as an extra limb. At first their acrobatic moves are hard to get the hang of, as they move so differently to Sam Fisher. Mercs are once again restricted to a first-person perspective, and although up against a far more nimble enemy, are more than powerful enough to put up a fight.

Double Agent's online offering bumps the player count from four to six, allowing matches of up to 3 Vs 3. Rather than complicate things by having different objectives for each map, all of Double Agent's ten maps pose a fairly straightforward task. The spies need to download data from various terminals and return the data to their insertion point, while mercs need to prevent them from doing this. Tactics are still quite complex, with the differences in abilities between the two classes being massive, but the online play is far easier to get into than in previous Splinter Cell games.

Online play works well on the PS3

One of best features in Chaos Theory was the rather brilliant co-op play, which saw you and a mate tackle proper missions together. This mission-based co-op has sadly been dropped in Double Agent, but you can play with up to two other players as spies against AI controlled mercs. These co-op missions are similar to the multiplayer levels and aren't nearly as good as those in Chaos Theory, but if you want to tackle bots with some mates, they're good for a few hours of entertainment. PS3 gamers get some extra maps and a female spy player skin, but it's not really enough to make up for the woeful presentation, especially when the content will be available for the 360 game in the future.

Splinter Cell Double Agent isn't the next-gen Splinter Cell experience that Ubisoft might want us to believe it is, but it's still a very impressive single and multiplayer experience. Sadly, this experience is considerably better on the Xbox 360, where the visuals and audio are far more polished. A handful of multiplayer additions and optional motion control lock picking simply isn't enough to counter these problems, making Double Agent on PS3 hard to recommend.