Ehrgeiz/YMMV

Game-Breaker: By filling your inventory with cheap items to use as sacrifices and abusing Save Scumming, you can easily max out your guardian multipliers, giving any of your equipment that's protected by them massive stat boosts and allowing you to ignore most of the Forced Level-Grinding the game expects you to do at the end of the game for reasons stated below.
- If you use any kind of potion when you're already at maximum HP, it increases your maximum HP and the length of your hunger bar slightly. They're not that expensive to buy and there's no limit to how much you can do this, so with enough money and patience, you can cap both of them out with little effort.
Good Bad Bugs: Koji and Claire in Quest Mode have to be leveled up separately, and you can only use one of them at a time. Even if you just decide to focus on one of the characters, he/she dies permanently just before the final boss. However, instead of spending hours leveling up the second character, you could just go to the room where the first character died and repeatedly kick his/her corpse. Since the body doesn't disappear, every individual hit counts as a kill worth a ton of experience. However, you don't actually gain the levels until you leave the room.
Just Here for Cloud: Rare was the two-player matchup where people played the original cast.
Polished Port: The PSX version adds more Final Fantasy VII characters, multiple minigames and a RPG-like game mode.
Scrappy Mechanic: The Save Game Limits imposed upon you in the Forsaken Dungeon. Your saves cost money. The cost is 10 gold multiplied by your level. Do the math as you go deeper down.
- The "nutrients" system is more trouble than it's worth as well: the stats you gain on level up depend on your current balance of nutrients, with proteins (meat) increasing your attack, vitamins (vegetables) increasing your magic attack, carbohydrates (mushrooms) increasing your defense, minerals (jelly) increasing your dexterity and lipids (poultry and fish) increasing your speed. However, since the dungeons and their enemies are randomly generated, your hunger bar drains rapidly, you only have limited inventory space with no stackable items, and there's no real way to see how much more experience you need for the next level up, and thus you can't properly prepare yourself for it by eating the right kind of food before the said levelup, you don't really have much of a choice on what kinds of foods you eat unless you want to backtrack every 10 minutes when you run out of your preferred kind of food and need to buy more. Thankfully, you still gain a minimum of 1 point in a stat per level up even without any focus on that stat and with endgame equipment, it doesn't make much of a difference anyway.