I'm sure there are a few people who have already posted the same sort of thing but I'm just going to say it anyway:
There is a special place in hell for multiplayer based trophies. If you were going to get the game maybe a few weeks or months after launch, good luck with them before the last two people left online decide its time to move on. Maybe you can use some dedicated trophy/achievement boosting forums if they might be active unless you are trying to platinum the PS3 versions of Aliens vs Predator (with a ton of online trophies for ranked matches where the matchmaking system barely works) and Brutal Legend (Server loves resetting your stats and online is completely dead).
Also I found this:
http://www.playstationtrophies.org/...ion/78965-unachievable-glitched-trophies.html
Seriously look at all these unobtainable trophies due to server closure, glitched trophies or just outright badly designed though my favourite has to be the A-men 2 for Vita;
"Reason: 13 S ranks are required but there are only 12 levels. As well as this, getting S rank on the last level requires you to kill 21 enemies but there are only 17 enemies which makes these three trophies are impossible."
Quality game design here people.
There is a special place in hell for multiplayer based trophies. If you were going to get the game maybe a few weeks or months after launch, good luck with them before the last two people left online decide its time to move on. Maybe you can use some dedicated trophy/achievement boosting forums if they might be active unless you are trying to platinum the PS3 versions of Aliens vs Predator (with a ton of online trophies for ranked matches where the matchmaking system barely works) and Brutal Legend (Server loves resetting your stats and online is completely dead).
Also I found this:
http://www.playstationtrophies.org/...ion/78965-unachievable-glitched-trophies.html
Seriously look at all these unobtainable trophies due to server closure, glitched trophies or just outright badly designed though my favourite has to be the A-men 2 for Vita;
"Reason: 13 S ranks are required but there are only 12 levels. As well as this, getting S rank on the last level requires you to kill 21 enemies but there are only 17 enemies which makes these three trophies are impossible."
Quality game design here people.