When Cyberpunk 2077 was launched on December 10, the game had been postponed several times and fans had been waiting for several years.
Over the next 10 days, the game sold 13 million copies.
The game's almost mythological status was largely due to the renowned game studio CD Projekt Red (CDPR), which is behind the game success The Witcher.
But several shortcomings were discovered shortly after launch.
In particular, the versions on Playstation 4 and Xbox One contained a lot of bugs and technical errors.
Sony removed the game from its digital store in December.
The game developer is reviewed
The Polish Authority for Competition and Consumer Protection (UOKiK) has now started an investigation against CDPR, according to the Polish business newspaper Dziennik Gazeta Prawn.
The authority must control how the game developer works on solutions and help customers who demand the money back.
It reports the British music magazine NME.
"We want an explanation from the company, regarding the problems with the game and the studio's actions," a spokesman for UOKiK told Dziennik Gazeta Prawn.
UOKiK will wait for an explanation from the gaming studio before the authority moves on.
Ultimately, the agency has the authority to fine the game developer up to 10 percent of the company's annual income.
It may also be relevant with digital bonuses for those who have bought the game for PS4 and Xbox one, where most bugs have been reported.
Investors sue the company
In December, an investor sued game developer CD Projekt Red.
The plaintiff believes that the company was not honest about what condition Cyberpunk 2077 was in before launch and thus misled investors.
The game has been corrected, but two major updates await in January and February.
CDPR has apologized and offers money back to the players who bought the game in store.