It is the biggest cull ever for the San Francisco-based company, but the workers will be relieved to know that it is not really mass-layoffs but a company reset they are experiencing.

The cull comes soon after interim boss Jim Whitehurst announced a "company reset" in November.

"We are ... cutting down the number of things we are doing to focus on our core business and drive our long-term success and profitability," Whitehurst wrote in the memo to all Unity staff on Monday.

Unity is not well-known outside the gaming world, but over 1.1 million game makers use its software tools every month, including the maker of the hit games "Pokemon Go", "Beat Saber" and "Hearthstone".

Monday's massive job cut will hit all teams, regions and areas of the business.

Whitehurst gave no details on what other changes are coming, in the exciting resetting process, but a company spokesperson said there will be more expected.

This is the fourth round of layoffs the company has done in the last year.