Are there any differences between Okami and Okami HD apart from the graphics

PS3Trophies.org's trophy guide & roadmap lists 4 missable trophies: No Furball on the Menu, From Imps to Demons, Barking Up the Cherry Tree and Leave No Chest Unopened

• No Furball on the Menu is only available during a certain part of the game and if you miss it, you must load a previous save.

• From Imps to Demons requires you to beat every enemy in the game, one of them is the Fire Doom Mirror, which is only available on one mission.

• Barking Up the Cherry Tree requires you, among other things, to finish the game with 5 deaths or less. This, of course is missable if you die more than that.

• Leave No Chest Unopened requires you to collect all 100 Stray Beads however it was brought to the attention of the Poster of the roadmap that one bead is missable

Note: It has been brought to my attention that you can miss one Stray Bead, the first one in the game, inside River of the Heavens, when this area closes up. It is pretty hard to not get it though.

Originally Posted by drkrZEN:
By the way, it should be noted, for those of you that want to complete this Platinum in one playthrough, that there is one missable Stray Bead not mentioned in the guide. At some point in the game, the entrance to the River of the Heavens closes off. You have ample time to get the Stray Bead there, and even if you miss it, its in the first 10 minutes of a NG+, but its still worth noting.

I recommend you check the trophy guide I linked to and the individual trophy descriptions so you know what to look forward to.

The version available on the PSN is the original PS1 version, without updated graphics or such. The Twin Snakes was a GC exclusive and isn't available on any other platforms.