Staff at Obsidian missed out on a bonus for Fallout: New Vegas because the game achieved a Metacritic score one point below the bonus threshold, developer Chris Avellone has revealed.

The game sold five million copies by the end of 2010, but scoring only 84 on Metacritic meant the studio missed out on a bonus.

"FNV was a straight payment, no royalties, only a bonus if we got an 85+ on Metacritic, which we didn't," Tweeted Avellone.

The news comes as the studio was forced to layoff around 30 staff following the cancellation of an unannounced project.

The fact New Vegas did so well for Bethesda, coupled with how close the game came to achieving an 85 Metacritic has left a sour taste in the mouths of the game's fans.

However, with a bonus such as this there must be a point at which the target is met and in Obsidian's case it wasn't. It does, however, highlight the importance Metacritic has within the industry.