HP+

HP+ is a recurring ability in the Final Fantasy series. It is a support ability that increases a party member's HP. Usually the boost is a set percentage of the character's base HP, though not always.

Final Fantasy IV
In the DS release, the HP+50% Augment is rewarded to the player by a soldier in Baron Castle once the Giant of Babil is destroyed.

Final Fantasy V
The Monk learns HP+10%, HP+20% and HP+30% as support abilities.

Final Fantasy VI
The Green Beret increases the wearer's max HP by 12.5%, while the Red Cap increases it by 25%. The Muscle Belt Relic raises max HP by 50%. Various Espers grant a level up bonus to HP, such as Bahamut granting HP+50%, causing the equipped party member to gain 50% more HP when they level up.

Final Fantasy VII
The HP+ Materia increases the equipped party member's HP by a set percentage depending on the level of the Materia, from 10% at level one to 50% at level five.

Crisis Core -Final Fantasy VII-
Various Materia pieces can be granted HP+ as a support ability though Materia Fusion The increase ranges from 10% to 999%

Final Fantasy VIII
Guardian Forces can learn the abilities HP+20%, HP+40% and HP+80%. GFs can also learn GFHP+10%, GFHP+20%, GFHP+30% and GFHP+40%. While the HP boosts must be equipped by the character to increase their HP, GFs always have the boosts from GFHP+ active.

Final Fantasy IX
Zidane, Steiner, Freya and Amarant can learn HP+10% and HP+20% from various equipment pieces.

Final Fantasy X
HP +5%, HP +10%, HP+20%, and HP +30% can be customized onto armor pieces using items, or armor pieces can be found with these abilities already attached.

Final Fantasy X-2
HP+10%, +15%, +20%, +40%, +60%, and +100% are all abilities found on accessories. HP+10% can be found on Black Ring, Sword Tome, Nature's Tome, and Bushido Tome, HP+15% on Cat's Bell, HP+20% on Iron Bangle, HP+40% on Titanium Bangle, HP+60% on Mythril Bangle, and HP +100% can be found on Crystal Bangle, Iron Duke, Key to Success, and Adamantite.

Final Fantasy XI
HP+% is a bonus on various food and equipment, though food tends to have a soft cap. Monks (and Blue Mages, with the right spells set) have a Max HP bonus trait that grants +30 HP bonus per rank.

Final Fantasy XII
HP Lore is an Augment found on the License Board that increases a character's HP by a stated set amount. With all five HP Lores acquired a character has +1000 HP.