Game Details
| Size | 1 GB |
| Region | USA |
| Genre | Action, Third Person Shooter |
| Format | 7z / ISO |
| Year | March 29, 2011 |
| Console | PSP |
The 3rd Birthday (2010/2011) is the long-awaited third entry in the Parasite Eve series, though it dropped the name due to licensing changes. It transformed the franchise from a survival-horror RPG into a high-octane, cinematic third-person shooter, pushing the PSP’s hardware to its absolute limit.
Game Story & Premise
In the year 2012, monstrous lifeforms known as the Twisted emerge from beneath Manhattan, threatening to consume the world. The only hope lies with Aya Brea, the protagonist of the previous games, who is found wandering near the site with no memory.
The Plot: Aya is recruited by the CTI (Counter Twisted Investigation) team to use a unique ability called the Overdive System. This technology allows her soul to travel back in time and “dive” into the bodies of soldiers on the battlefield. By possessing different people, Aya must change the past to prevent the global extinction of the future.
Back Cover Description
CHANGE THE PAST TO SAVE THE FUTURE.
“New York City is in ruins. A mysterious, biological menace known as the Twisted has decimated the population, and the world stands on the brink of collapse. Mankind’s only weapon is a woman with a forgotten past and a terrifying power.
As Aya Brea, you must master the Overdive System—a revolutionary ability that allows you to leap into the bodies of soldiers in the heat of battle. Strategically swap between units to gain tactical advantages, unleash devastating ‘Liberation’ attacks, and customize your DNA to evolve your combat skills. With breathtaking cinematics and a haunting score, The 3rd Birthday is an action-packed epic that redefines the limits of the PSP.
The clock is ticking. Will you dive into the nightmare?“
Key Gameplay Mechanics
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Overdive (Body Swapping): You don’t just stay in Aya’s body. By pressing Triangle, you can instantly warp into any nearby soldier. This is used for healing (swapping into a healthy body) or flanking enemies from different angles.
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Overdrive Kill: If you stun an enemy, you can “dive” directly into them, dealing massive internal damage in a violent psychic blast.
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DNA Customization: You collect “Overenergy” (OE) chips from enemies. You can plug these into a $3 \times 3$ grid to give Aya passive buffs like health regeneration, increased damage, or even a “Phoenix” auto-revive.
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Weapon Customization: There are over 50 weapons, ranging from handguns to satellite lasers, each with multiple upgrade paths for barrels, sights, and magazines.
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The Clothing Damage System: As Aya takes damage, her clothes (and armor) realistically tear and shred, which lowered her defense until she reached a locker to change.
Secret Costumes & Unlocks
The game is famous for its unlockable outfits, many of which are nods to other Square Enix titles.
| Costume | How to Unlock |
| Knight Armor | Clear the game once on any difficulty. |
| Maid Outfit | Clear the game twice. |
| Lightning (FFXIII) | Collect 7 Stamps on the Square Enix Members site (Legacy) or clear the game on Hard. |
| Swimwear | Clear the game on the “Insane” difficulty level. |
| Aya’s Classic PE1 Outfit | Earn a specific rank or clear the game 4+ times. |
Short Review: A Technical Powerhouse
The Good
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Graphics: Frequently cited as one of the best-looking games on the PSP. The character models and particle effects rival early PS3 games.
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Soundtrack: A fantastic collaboration between Yoko Shimomura (Kingdom Hearts) and Mitsuto Suzuki, featuring intense industrial beats and haunting piano melodies.
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Replayability: With multiple difficulty levels, weapon upgrades, and numerous endings, it’s built for multiple playthroughs.
The Bad
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Controls: Since the PSP lacks a second analog stick, the camera is mapped to the D-pad, which can feel clunky (though it’s much better if played on a Vita or Emulator with mapped sticks).
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Story Confusion: The plot is notoriously complex and controversial among long-time Parasite Eve fans, especially regarding the final “twist.”

