yes u can
You have to play lots of games on it...:)
To check your trophies on PS3 go to Games in the XMB. Near the top of the list there will be a trophies option, select this and submit. If you have an online account your trophies will be synced to or from your account. After the sync(if any) you will be able to see all your games that support trophies, and the trophies you have earned for each one.
The games that don't have trophies are the games havee came out before October 2007. The games later than that date would have trophies.
The list of Games on the related link indicate whether the games have trophies
there are many trophies for different games.
Burnout Paradise 98 trophies
No many PS3 games do not have trophies. a link of a list or PS3 games has been added and the last column on the list indicates whether they have trophies
no.
is there gonna be trophies for army of two
you cant get free trophies but you can try getting them cheap at yardsales, or you can play games for them
Yes, you still get trophies if you download the games online.
PS3Trophies is a forum where people can share tips on how to obtain trophies, for both PS3 games and PSVita. The trophies for each game are not only listed, but their unlock conditions are explained.