The Net Yaroze is a development kit for the PlayStation video game console. It was a promotion by Sony Computer Entertainment to computer programming hobbyists in 1997. Yarōze means "Let's do it together!".
The Net Yaroze (DTL-H300x) package contained a special black-colored debugging PlayStation unit with documentation, software, and no regional lockout. The user has to provide a personal computer (IBM-PC or Macintosh; NEC PC-9801 was also supported in Japan) to write the computer code, compile it, and send the program to the PlayStation.
There are further differences between the Japanese kit and the others; the manuals are in Japanese, the software for Japanese PCs is included, and the discs and access card sticker have different printing. The Japanese version is sometimes unofficially referred to as DTL-3000 rather than DTL-H3000.
The Net Yaroze was only available for purchase by mail order; but Sony also provided it to universities in the UK, France and Japan.
This unit is extremely rare, and considered a must have for Sony and video games collectors.