• Infinity's FPS in multiplayer mode is now raised to 30 FPS. Portable 2 multiplayer mode is capped to 20 FPS (a 60 FPS patch is now available for Phantasy Star Portable 2 USA version. See above patches).

• More Bullet PAs are added in Infinity: every ranged weapon now has 2 different animations to choose from for firing a charged shot

The below is an excerpt from DeviFoxx’s detailed & complete translation guide for Infinity (found here)

• EPISODE 2: This is an extension of the first story in the original Phantasy Star Portable 2. This Episode takes place 1 year later in which everyone [the supporting cast from the first adventure] is currently enjoying their lives since the defeat of the Sun God Cumern in the previous episode. However the appearance of an amnesiac Duman girl named Nagisa and her ancient partner, the perverted Wynarl, set new event in motion as they traverse the Gurhal system in effort to gather Dark Fallz fragments.

• Duman race: a new 5th playable race of characters. Dumans are a race of genetically altered humans whose DNA has been corrupted after coming in contact with the SEED. Common physical characteristics include an eyepatch over one eye and extremely pale colored skin. They have high physical and technique attack power potential but the drawback is that they have paper thin defense. This essentially makes them glass cannons who have to rely on a evasion instead of defense for survival

• Storage capacity increased: capacity has been increased from 1000 to 2000

• All Nanoblasts now grant invincibility: while the duration for most Nanoblasts for beasts have been shortened to 30 seconds, the advantage is that while in Nanoblast form, your Beast character will now be invincible!

• Scape Doll collectin has been modified: Scape Dolls will automatically go to your common storage box if you are currently carrying one on your person.

• Rebirthing: While the level cap still remains at 200, at the Job Type Counter there is a new option called Rebirth, which allows you to allocate more points to individual stats (Max HP, Max PP, Power, Mind, Defense, Evasion, etc), ultimately making your character stronger. However, after doing so your level will be reset to Lv.1, and you have to level up to 200 all over again. Rebirthing can be done as much as you like, however there is an “upper limit” to how high you can boost your stats.

• Stats like HP are higher: In the original game, stats were still fairly low in spite of being at higher levels like 150+ and beyond. This has been rectified now so that players characters will have much higher base stats in accordance with character levels.

• PP Regen Higher: The regeneration rate of PP after using a PA Skill / Bullet / TECHNIC has been increased

• Difficulty curve on missions lowered: Tough missions like The Magashi Plan can now be successfully completed without requireing specific Job and Weapon setups to make the mission easier.

• Total items increased to 3000. Costumes, Weapons, Armor, Furniture, Music Discs: Bursting with content

• Type Level Capacity Increased: levels of job types has been increased from Lv30 to Lv50

• More Type Abilities: in accordance with the level boost, type abilities have been added

• More TECHNICS: more technics have been added to the Force’s arsenal. A general favorite now is Sazonde, because it creates a very high chain and juggles the enemy in the air simultaneously

• Type level up rate is faster from lv31-50: the grind past lv30 isn’t as grueling as it was to reach it. In fact, thanks to some of the new download missions like Maximum Attack Infinity 1-4, type leveling is now basically nothing at this point. You can jump from Lv1 to Lv50 in about 3-4 days on average. No more having to spam The Magashi Plan anymore!

• New Areas: a host of new areas, zones, and battlefields to adventure upon. Ranging from CLAD 6’s Beach Resort, to the Holy Ark of an Anctient Space Diety