The U.S.-based gaming giant Activision Blizzard -- which made a player forfeit $10,000 in prize money and banned him from a game for one year after he voiced support for pro-democracy protests in Hong Kong -- was slammed by critics Tuesday who accused the company of prioritizing its pursuit of business in China over supporting free speech.

Activision Blizzard, based in Santa Monica, Calif., banned Ng Wai Chung, who plays remotely from Hong Kong, from competing in the company’s online multiplayer card game Hearthstone E-sports for one year. The 21-year-old known online as "Blitzchung" had just won $10,000 in the Hearthstone Asia-Pacific Grandmasters tournament when he declared in a livestream video interview in Mandarin: “Liberate Hong Kong, revolution of our times.” He was wearing a gas mask and goggles, the same equipment worn by Hong Kong's pro-democracy demonstrators, when he made the statement, The Guardian reported.

BLIZZARD BANS HEARTHSTONE PLAYER FOR SUPPORTING HONG KONG 'REVOLUTION'

U.S. lawmakers from both sides of the aisle tweeted Tuesday that Activision Blizzard’s decision to censor one of its players’ political views speaks to a wider concern about China’s market power being used as leverage to stifle free speech worldwide.

“Recognize what’s happening here. People who don’t live in #China must either self censor or face dismissal & suspensions,” Sen. Marco Rubio, R-Fla., wrote on Twitter. “China using access to market as leverage to crush free speech globally.”

Sen. Ron Wyden, D-Ore., said: “Blizzard shows it is willing to humiliate itself to please the Chinese Communist Party. No American company should censor calls for freedom to make a quick buck.”

The Chinese tech company Tencent owns a 5 percent stake in Activision Blizzard, which earned $173 million, or about 12 percent of its total revenue, from the Asia-Pacific region last quarter, according to the company’s public earnings report.

China's government has targeted an array of U.S.-based organizations, including the NBA, for perceived support of the Hong Kong anti-government protests. Apple Inc. became the latest on Wednesday when the ruling Communist Party's main newspaper criticized the tech giant for a smartphone app on its App Store that allows activists to report police locations and use of tear gas.

Chung addressed the controversy Tuesday in a livestream on a different service called Twitch, the New York Times reported.

“Today, what I have lost in Hearthstone is four years of time,” he said, referring to the time and energy he’s dedicated to play the game professionally. “But if Hong Kong loses, it would be the matter of a lifetime.”

“I didn’t expect my comments would make a huge impact,” he continued, according to The Guardian. “This is my freedom of speech. ... I shouldn’t be scared. I hope my act can inspire other gamers like me, to continue to support the movement in Hong Kong.”

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Activision Blizzard said in a statement that Chung had violated a tournament rule that prevents players from engaging in any act that “brings you into public disrepute, offends a portion or group of the public, or otherwise damages Blizzard image.”

“While we stand by one’s right to express individual thoughts and opinions, players and other participants that elect to participate in our esports competitions must abide by the official competition rules,” the statement said.

A small group of Activision Blizzard employees gathered outside headquarters in Irvine, Calif., on Tuesday in support of Chung, The Daily Beast reported. Fellow gamers also called for boycotts of Activision Blizzard gaming sites, which include other multiplayer hits like World of Warcraft and Overwatch, and voiced support for Chung in a popular Cantonese-language online forum called LIHKG, The Guardian reported.

The Associated Press contributed to this report.