For World Revolution RPG, do note that when exploring, tiles you have been directly on are brightly lit, while the surrounding ones are dim. Major towns show up as green circles on dim tiles, but more 'special' locations such as the sarreno lab show up only on brightly lit tiles. Yes, that means you have to explore every single tile in that region.
Tips for the game? Just get the best weapons, and don't waste your money elsewhere. Other than that, just note the bonus each character has. Look them up in the 'team' tab in the menu. For example, the main guy has bonuses for using pistols, therefore he should never use anything but pistols.
Save after every battle.