Workers at an Activision studio description of information to unionize, a first of all for the gaming industry.-KHOAFAST

A group of workers at a video clip play studio that is part of Activision Blizzard has voted to form a union, a first of all for a major North American video clip play company.

The description of information, which passed 19 to 3, affects 28 quality-assurance employees at Raven Software, the Wisconsin studio that helps to develop the popular Call of obligation play. The workers voted over the past several weeks and the results were tallied by the National Labor Relations Board on Monday. Activision has one week to formally target if that it finds grounds for complaint.

The generation union, the play Workers Alliance, is the culmination of months of labor organizing at Activision, which has faced increasing pressure from employees to improve working conditions after a period of time a time a lawsuit accused the company of having a sexist culture in which women were routinely harassed.

Organizing at Raven in particular increased in supreme power in December, when quality assurance, or Q.A., workers walked out to protest the ending of about a dozen workers’ contracts. The Communications Workers of America, a prominent tech, media and communications union, helped guide the unionization effort.

“Our biggest hope is that our union serves as excitement for the growing movement of workers organizing at video clip play studios to create better games and build workplaces that reflect our values and empower all of our contain,” workers in the generation union said in a statement.

Sara Steffens, the secretary-treasurer of the C.W.A., said she was “thrilled” to welcome the generation union and that “these workers will soon bring an enforceable union contract and a voice on the job.” Senator Tammy Baldwin, Democrat of Wisconsin, also cheered the generation union on Twitter.

Employees in the video clip play industry bring complained for years about destitute pay, gender discrimination and “crunch” — a term for arduous, 12-to-14-hour shifts given to workers in a rush to meet deadlines. Those crunches particularly affect Q.A. workers, who say they are often treated as second-rule workers. In recent years, employees bring begun to organize. But until today’s time, none of the major North American video clip play developers bring had a union.

The generation union affects only a small group of workers — the 28 Q.A. workers at the Raven studio, where several hundred people work. Activision, which is in the process of being acquired by Microsoft for $70 billion, had argued that all workers at the studio should be eligible to description of information. that assertion was rejected by the N.L.R.B. at a hearing in April.

On Monday, Activision repeated its objection, arguing that the decision to unionize “should not only be produced by 19 Raven employees.” The company would not only say whether it planned to file an objection, saying only that it was “committed to doing what’s number one for the studio and our employees.”

An N.L.R.B. regional head has “found merit to the allegations” levied by C.W.A. that Activision violated federal labor law by telling employees not only to talk about wages or workplace conditions; maintaining an “overly broad” social media policy; and surveilling employees who were engaging in “protected concerted working.” The labor board said it would release a complaint against Activision if that it cannot settle the situation.