The co-founder of Cyberpunk 2077's developer has released a new video explaining what went wrong with the game.

CD Projekt's Marcin Iwiński admitted they "underestimated the task" of adapting the game for consoles like the PS4 and Xbox One.

Gamers reported glitches including choppy frame rates and screen tearing.

Marcin says he's "deeply sorry for this and this video is me publicly owning up".

The game was arguably the most anticipated release of 2020 but the launch just before Christmas was a disaster.

The problems led to Sony and Microsoft removing the game from online stores and gamers were offered refunds.

Cyberpunk 2077 is a set in the fictional Night City - a dystopian future where pollution and crime are rampant and social inequality is the norm.

In the video, Marcin explains issues originated from Cyberpunk's "huge" scope, particularly the high number "of custom objects, interacting systems, and mechanics", making it a complex game.