History of video games/Platforms/PlayStation Portable

Background
Though Sony had previously dabbled in portable consoles with the PocketStation accessory for the original PlayStation, the PlayStation Portable would be Sony's first serious attempt at a competitive major portable console.

Launch
The PlayStation Portable launched in Japan on December 12th, of 2004 at a cost of 19,800 yen.

The PlayStation Portable launched in the United States and Canada on March 24th, 2005 at a cost of $249 United States dollars or $299 Canadian dollars.

Production
On October 1st, 2009 the PSP Go was released as a digital exclusive PSP that removed the UMD drive.

Legacy
The PSP was succeeded by the much more powerful PlayStation Vita. The PSP is iconic in some regions as a capable handheld for it's era.

PSP production stopped in 2014 with about 70 million consoles sold. In early 2021 Sony announced the PlayStation Portable online store would be shuttered on July 2nd, 2021.

Technology
The capabilities of the PlayStation portable were roughly between the original PlayStation and the PlayStation 2, offering an impressive level of portable performance for the time.

Compute
The PSP used two MIPS architecture R4000 processors clocked at 333MHz, with one used as a dedicated CPU and one as a dedicated Media Processor.

The PSP had a custom dedicated GPU clocked at 166MHz that outputs 24 bit graphics.

Early models of PSP had 32MB of RAM, with later models having 64MB. The media processor had 2MB of DRAM, and the GPU also had 2MB of DRAM.

Display
The PSP had a backlit 4.3 inch diagonal thin film transistor LCD with a resolution of 480 by 272 pixels.

2004

 * Metal Gear Acid
 * Lumines: Puzzle Fusion

2005

 * Metal Gear Acid 2

2006

 * Mega Man Powered Up
 * Killzone: Liberation

2007

 * Crisis Core: Final Fantasy VII
 * Patapon

2008

 * Prinny: Can I Really Be the Hero?
 * Phantasy Star Portable
 * Patapon 2

2009

 * Phantasy Star Portable 2

Persona 3 Portable
A port of the PlayStation 2 JRPG Persona 3. This game is notable for being among the few games of the time to feature substantial story differences depending on the player selected gender of the protagonist.

Read more about Persona 3 Portable on Wikipedia.

Metal Gear Solid: Peace Walker
Read more about Metal Gear Solid: Peace Walker on Wikipedia.

Danganronpa: Trigger Happy Havoc
A genre blending visual novel with exploration and shooter sections.

Read more about Danganronpa: Trigger Happy Havoc on Wikipedia.

Z.H.P. Unlosing Ranger VS Darkdeath Evilman
An innovative tactical role playing game with rougelike elements.

Read more about Z.H.P. Unlosing Ranger VS Darkdeath Evilman on Wikipedia.

Last Ranker
Read more about Last Ranker on Wikipedia.

2011

 * Patapon 3

2012

 * Danganronpa 2: Goodbye Despair

Unconventional Uses
Hilton Ultimate Team Play was a first person simulation game used by Hilton Garden Inn Hotels to train employees around 2008 and 2009. Only 500 UMD copies of the game were produced, and require a special memory card and security certificates to run.

Special Edition Consoles

 * Madden Metallic Blue

Development
There are two Wikibooks on developing for the PSP, PSP and PSP Development. There's also a Wikibook on running Map This! on the PSP.