wow, nice necro post Acs.
But the easiest game to get a platinum trophy now is Terminator Salvation. 11 golds and a plat. Just complete the game on hard and you've got it.
Don't know which game will top this one as easiest Plat trophy to get.
terminator salvation is by far the easiest platinum trophy, you will spend less then 5 hours beating this game if your looking for easy platinums make sure to beat the game on hard very cheap to buy and really i suggest renting it for one night because it won't even take you 6 hours to beat the game. but it also depends on the your level of game play for a game. example lbp i thought was a very fun game but was my hardest platinum.
1. Burnout Paradise by far
3. Resident Evil 5 (people with rocket launchers can practically give the platinum to you playing co-op online)
I also have God of War Collection platinums and like 2 away from Assassins Creed 2 and Tekken 6, but I don't think that highly of trophies any more that I'm going to search for feathers, and tho I'd love to beat it, that Night Train level in Tekken 6 is pure evil.
botch call of duty world at war and modern warfare 2 spec ops takes a while though. I got 3 bad company 2, WaW, and MW2. And right now im working on my 4th on which is Mafia 2!!!