Hints for number three and two. I'll start using # like everyone else. I think maybe people didn't notice them.
#3. Lufia 2 compared to the original is one of the most improved sequels ever. Similarly, the second game in this Playstation RPG series could be looked at as one of the most improved sequels ever or the most improved sequel. It adds everything that wasn't in the first game. World maps that you can traverse, towns, dungeons(or atleast more than one,) the ability to capture and use monsters as party members, etc. The game also has a feature that you can import your save data from the original game, so the characters on that game when you receive them will have the same level if it's high enough, as well as a lot of items.
#2 This game was remade for the PSP. This is not the PSP version though, which I think introduced so many problems that the game isn't even enjoyable to play, adding a massive amount of grinding. New classes that you could change to that started on level one, equipment that had a level requirement, a skill system where there are damage modifiers to the type of enemy you're attacking and increases power against that group the more you level it up by attacking them. The remake was developed and localized by one well known company, while the original game was localized by a different company.