Considered perhaps the most difficult Platinum of all the James Bond related games, the 4-star rating is mainly due to the ridiculous amount of time and effort required in the online portion of the game. With a boosting partner, this difficulty rating could be brought down to a low 3-star, though will still take a lot of time to complete.

Aside from the 10 online trophies, the game requires two playthroughs, plus some mopping-up via chapter select. Some of the offline trophies can be rather tricky as well, such as completing the game on 007 Difficulty mode, and the Speed Run trophy which involves a car chase.

Without a boosting partner, expect well over a hundred hours on this one. With a boosting partner, perhaps around 50-60 hours.

You'll first need to play and complete the game on any difficulty mode, in order to unlock 007 Difficulty. This is your chance to find all the Intelligence collectibles, as well as focus on some of the kill-related and other miscellaneous trophies. If you miss anything, don't fret.

Now that you've unlocked 007 Difficulty, you can go ahead and start your second playthrough. Again, you can earn any other miscellaneous trophies you missed on your first round if you wish, or wait for the next stage in your hunt for the Platinum. But be warned, 007 Difficulty is no cake-walk.

After that, you can take advantage of the Chapter Select and mop-up any of the offline trophies you still need. Check out the James Bond 007 Blood Stone trophy guide links under our Links tab for specific details on what you need.

Last, are the 10 online trophies. And this is where the real grind comes in. The Special Commendation trophy will take you the longest, earning medals which require you to kill 200 enemies with a grenade launcher, or play a total of 500 matches. A boosting partner will certainly cut down your time, but will still require an ample amount of effort.

Rob created a great Walkthrough, here:
http://www.videogamesblogger.com/2010/11/02/james-bond-007-blood-stone-walkthrough-video-guide-xbox-360-ps3-pc.htm

And a Walkthrough on IGN:
http://www.ign.com/wikis/james-bond-007-blood-stone/Walkthrough

And a text-based Walkthrough, by Adenosine:
http://www.gamefaqs.com/ps3/995480-james-bond-007-blood-stone/faqs/61269

Guttsu-87 has a great Trophy Guide, here:
http://www.playstationtrophies.org/game/james-bond-bloodstone/guide/

And a great Trophy Guide created by trophybot:
http://ps3trophies.com/forums/showwiki.php?title=PS3-Trophy-Guides:James-Bond-007:-Blood-Stone-Trophy-Guide

Adam Wolfe has a useful Trophy Guide, here:
http://www.playstationlifestyle.net/2010/11/14/james-bond-007-blood-stone-trophy-guide/

Here's a few useful Trophy Guide Tips, by Garrett Hartman:
http://www.ripten.com/2010/11/05/007-blood-stone-achievement-trophy-guide-mauler/

Here's a list of Online Medal Requirements, by Guttsu-87:
http://www.playstationtrophies.org/forum/james-bond-007-blood-stone/76804-james-bond-007-blood-stone-road-map-trophy-guide.html#post1238617

And an Intel Collectibles Guide, by Rob:
http://www.videogamesblogger.com/2010/11/05/james-bond-007-blood-stone-intelligence-items-locations-guide-xbox-360-ps3-pc.htm

Here's a Boosting Forum on PlaystationTrophies:
http://www.playstationtrophies.org/forum/james-bond-007-blood-stone/76751-trophy-boosting-thread-read-first-post.html

And a Boosting Forum on PS3Trophies:
http://ps3trophies.com/forums/james-bond-007-blood-stone/6275-official-james-bond-007-blood-stone-boosting-thread.html

Finally, here's a basic Trophy List:
http://www.playstationtrophies.org/game/james-bond-bloodstone/trophies/