Considered a puzzle platform game (or a platform for games) LittleBigPlanet is unique in its own right.
You play as Sackboy who lives in a world of creations, made by the Eight Creator Curators. However, one of these Curators has plans of his own, and begins stealing all the creations while kidnapping the other seven Curators. It's your job to run, jump, and grab your way to helping your friends and stopping the rogue Curator.
However, that's only part of the fun. The other is creating your own levels, posting them online, and playing some of the MILLIONS of levels put together by other players. For the most part, your imagination is the only limitation to creating your own game.
There is also a vast assortment of DLC available - including extra levels which include items you can use when creating your games, such as the "paint gun" from Metal Gear Solid, or "water" from the Pirates of the Caribbean level, as well as numerous costume packs.
This game requires more time than skill, some creativity, and friends (either real or online). Part of the trophies involve going through each of the levels, collecting all the bubbles, and managing to clear each stage without dying. The other involves creating a level, posting it online, and advertising it by playing other people's games.
Passing a level is easy. Finding all the bubbles takes time and patience, as well as the Links which we provide. There are some bubbles in which you'll need more than one player (sometimes up to 4) in order to grab. Either buy some extra controllers and invite friends over, or go online and wait patiently for enough people to join.
NOTE: The Online servers in the Japanese region closed in July 2016, which means the online trophies - and therefore the Platinum - is no longer obtainable in Japan.
You'll probably hear a great many "blings" as you collect trophy after trophy during the start of the game. Don't let these fool you - there are many more trophies which will require much time and patience.
You may want to start building your own level and post it online early, since it will take quite a bit of time to acquire the necessary trophies. The trophies Crowd Pleaser, Feel The Love, Celebrity, and Create are basically out of your hands. You'll just have to sit tight and wait for people to play your level - hopefully hearting it, and you, afterwards.
To speed up the process, start playing other people's online games, heart them, then leave a message saying "H4H" which means "heart for heart." This signals the other player to try your level, and heart it. WE recommend only doing this with players who, on their list of messages, have several H4H comments. The reason being, is that some players out there feel strongly against "hearting" for the sake of getting a trophy, and won't bother with your level.
To get the Crowd Pleaser trophy a bit faster, you can make a new account on your PlayStation 3, pop in the game, and play your other account's online game 50 times. Yes, this works!
For Party Person, Socialite, and Top of the Class, you'll need to start making friends online. Start adding people to your friend's list and try to coordinate a time when you can play together, and remember to take turns winning each level.
Some trophies, such as 20X Multiplier or Sackbird, can easily be done online. Do a search for those trophy names, and you'll find a community level where those challenges are easily performed.
The links you'll need most are story-based, allowing you to find all the hidden bubbles in each level. The one we found the most useful was by Absolute Steve. You can click on each level, and they will list all the prize bubbles before providing the Walkthrough, along with pictures:
http://www.supercheats.com/guides/little-big-planet/
Also, we have another Walkthrough on IGN. However, unless it's been updated, we found the odd prize bubble missing in their guides:
http://guides.ign.com/guides/856680/page_3.html
And here's a simpler Walkthrough by Andre Segers:
http://www.gamespot.com/features/6200897/index.html
And, while lacking pictures, LittleBigPlanetWiki has a very detailed, text-based Walkthrough:
http://littlebigplanet.wikia.com/wiki/LittleBigPlanet_Walkthrough
For Trophy Guides, we found this one useful by Majed Athab:
http://www.joystiq.com/2008/11/06/trophy-guide-littlebigplanet/
Another Trophy Guide on PS3 Trophies:
http://www.ps3trophies.org/game/littlebigplanet/guide/
Here's a simple Trophy Guide by Phoenix8387:
http://playstationlifestyle.net/2008/10/30/psls-trophy-guide-littlebigplanet/
Finally, here's a basic Trophy List:
http://www.ps3trophies.org/game/littlebigplanet/trophies/