In Final Fantasy 7 Remake, you can customize your party's stats and further specialize their roles in battle via the Weapon Upgrade system. This series of weapon-specific skill trees expands the more you level up your characters and increase their max SP (skill points).
Below, we've outlined some background on Weapon Upgrades, as well as a reliable approach to upgrading your party's weapons during the game's first handful of chapters--one you can even use throughout the whole game if it works for you. If you find it doesn't work for you, you're welcome to respec at any time by talking to Chadley, a character you meet in a side mission during Chapter 3, who you can pay to reset your upgrades.
For more guides, be sure to check out our feature highlighting essential tips to know as you play Final Fantasy VII Remake, as well as our Materia Loadout guide. Otherwise, read our Final Fantasy VII Remake review for our full thoughts about the game.
Once you've familiarized yourself with the combat system and your party's strengths and weaknesses, you're going to want to build out their weapon specs to improve their statistics to match different roles. Fortunately, each weapon's base stats naturally fulfills a role, so you won't have to spend too much time figuring out how to specialize them. Still, the more methodically you spend the finite points you earn to upgrade a weapon, the better your party will be.
Since Cloud is always in your party, you generally want him to be your jack-of-all-trades, so you'll want to focus on bumping up both his attack and magic power. His first two weapons, the Buster Sword and Iron Sword, mainly cater to that role in their upgrade trees. With max HP and defense at mid-range compared to Barret and Tifa, you'll want to improve those stats to ensure he can still take a few hits before being in the red.
Later on, you'll gain access to weapons that allow you to better specialize Cloud in either attack or magic. Still, in the early hours, prioritize making him as balanced and versatile a fighter as possible.
You're mostly stuck with Barret's Gatling Gun during much of the early game, so there are no other specialized roles he can fill, but the role he does fill is essential. Due to Barret's natural resilience against damage, it's vital to keep bumping up his max HP and defense, so you can ensure he's still standing to either cure or revive your party after they take a massive blow from a powerful boss attack.
Focus on expanding Barret's max HP and on improving on his attack and magic strength, so that he always packs a sizable punch when you need him to.
You don't want Tifa to be a glass cannon, though, so you'll also want to invest in upgrading her max HP. She has the lowest health pool compared to Cloud and Barret, so make sure she has enough to survive most attacks.
Despite having the lowest magic attack in the party, Tifa can be of some use casting spells, and you'll generally want to improve her capabilities early on due to its functionality to the party, but try not to prioritize it. Because once you get Tifa a pair of Metal Knuckles during Chapter 5, you're going to want to go all-in empowering what she does best, and that's laying down near-constant damage with everything in her repertoire in all situations.
Aerith is primarily a mage, and even her normal attack is firing ranged blasts of magic, so you want to think about how you outfit her in terms of not just how she can heal people, but what damage she can do. The question of how to spec her usually comes down to what kind of role you want her to play: Aerith can often get boosts to her elemental spell damage, allowing you to use her as a straight damage-dealer or to exploit enemy weaknesses, or you can spec her to specialize in buffs and debuffs. Either way, Aerith is a formidable magic-user, and you'll want to stack her Materia slots and increase her MP as much as possible.
Aerith's downside is that she has a fairly low health pool and low defenses, making her bad in a straight fight. Boosting her HP and defenses helps a lot, but regardless of the spellcaster role you put her into, it's good to outfit her with Healing Materia so she can keep herself and the rest of the team strong.