yes... it is possible
dynasty warriors 4 extreme legends
on Hard mode
Get 800 kills in Hard Mode
okay, 5 extreme legends has a destiny mode which you become a soldier for a force under an officer of your choice, and you work your way up, 5 extreme legends has an edit mode. it has a legend mode as well, with lots of levels that were not an dynasty warriors 5, there is also an extreme mode which is you select your officer, you start on basic stats and you work your way through levels, and do tasks, eventually, making the land your own, by establishing your own territories, and defending them xtreme legends also has an option which involves inserting the dynasty warriors 5 disc, after that, you are able to use the free mode and musuo mode on xtreme legends. (though when you turn off, you have to do this process with dynasty warriors 5 again)
On hard mode get 50 kills in 4 minutes
Get 100 kills in 3 minutes on hard mode
im not sure, but a good site is gamefaqs, it has heaps of cheats and things that can help. www.gamefaqs.com
Achieve 300 KO Count in under 4 minutes on hard.
Get 100 kills in 6 minutes and 35 seconds on hard mode
Get 300 KO Count in under five minutes and win with the difficulty on hard
Achieve 100 KO Count in under 4:30 minutes on hard.
Don't let any one pass the bridge and kill all generals on hard