- Estimated Platinum Difficulty: 3/10 (Platinum Difficulty Thread)
- Approximate Time To Platinum: 20+ hours for SP. MP depends on how much you can grind at once, but will take several hours.
- Trophy Breakdown: (22, 21, 1, 1)
- Offline: (20, 20, 1)
- Online: (2, 1) (No PSN pass required)
- Missable Trophies: None
- Minimum Playthroughs Needed: 1
- Difficulty Affects Trophies: No difficulty
- Glitched Trophies: N/A
1) Complete the Story and try to get 100% Sync
The fun thing about Assassin's Creed is the 'open world', meaning you can backtrack. This also means you are NOT required to get every collectible from start. You can revisit each zone in Liberation after finishing the story, which means you can not possibly miss any mission(s), collectibles, shops or any trophy at all.
However, you should try to get 100% sync on every mission during your 1st (story) playthrough. The reason for this is the low difficulty of each objective and the fact you won't have to replay certain sequences after finishing up the story. Like Assassin's Creed III, there is also a new checkpoint system that resets the 100% sync if you fail.
Another important thing to note in Liberation are the personas (costumes). Aveline has three different costumes with unique collectibles and moves. To get every trophy/collectible, you'll have to wander around with every costume. For most missions though, just use the Assassin outfit as that is by far the best one. As for collectibles, the Lady uses her charm ability to gather gems from certain gentlemen, the slave pickpockets Voodoo Dolls and the Assassin beats up thieves for coins.
The most important thing in this step though, is to enjoy the story in Liberation, relax and try to get every sequence up to 100% sync. You should also try and get most viewpoints, buy most of the shops and complete several side quests. This will make the cleanup shorter, although it is not required.
2) Clean up
If you missed certain viewpoints, collectibles, shops or side-quests, now is the time to get them. The same for any of the weapon trophies, such as murdering five guards with the Sugarcane machete. The length of this step depends entirely on you.
The multiplayer in AC:L is not your average Assassin's Creed multiplayer. It's somewhat like a Facebook game, where you send troops to battle/economic missions, which make use of energy. Your troops need this energy to get the most out of missions so you'll have to take breaks between missions. For "Completionist", you will have to reach lvl 15. If you're in for a grind, you could reach that level in only a few hours, (0 energy characters can still battle and earn the exact same amount of xp). You'll also have to do 100 battles and 30 economic missions, which is not that hard. You keep getting more troops each level and each troop has about 5 base energy.
Looking at the bright sight of things: the MP does not require any PSN pass, so you can safely buy a second hand copy of AC:L and still get the platinum. Renting is an option, as you can grind the MP in a few hours if you've got the attention span for it.
4) Game corruption
Unfortunately, this step is important enough because quite a few people have encountered this so far. While typing this, no patch has been made to fix it. Ubisoft has been emailed and they are aware of the problem. Basically, there's a small chance the game can corrupt on you. You will notice this when you want to continue the story and Aveline simply disappears in the Animus after a second, (after which the game restarts). There is simply no way to fix this, except for restarting the entire game. Some people, including myself, had this happen after completing the game which can cause much frustration. Because of this, achieving 100% sync during the story should be your main target just so you can at least rush the story without 100% if the game gets corrupted. Getting every collectible, which is quite easy thanks to the collectibles guide, should be your second target. Getting both these targets before getting corrupted saves you a lot of fuzz. This is, however, optional as you may not get corrupted at all but getting both 100% and the collectibles is easy enough anyway.
Note: If you completed every mission and 100% was the final thing you had to do, you can create a new game (without deleting the "corrupted" game data) and you should still be able to access the DNA's via the menu. This way you can still get 100%.
PS3T Would Like to Thank GuerrillaDawg for this Road Map]