Gave positive coverage to Zoe Quinn while financially supporting her. Soon after this was brought to light, Polygon updated their ethics policy and disclosure was added to this article.

Claimed to have been harassed by GamerGate, while claiming he wasn't receiving any messages on GameJournoPros.

Participated in the Gamers are dead media blitz with a scandalmongering editorial.

Gave Gone Home a lavish review without disclosing her personal ties with game composer Chris Remo and, through the Idle Thumbs group, possibly lead developer Steve Gaynor. Riendeau appeared for the first time on the Idle Thumbs podcast, with Remo, a week before the review was published, and has since become a regular host.

Gave positive coverage to GaymerX without disclosing her friendship with both the convention’s president and CEO.

While she disclosed her “personal aquaintance” with Leigh Alexander two times, she didn’t in her very positive coverage of Sunset which Alexander was involved with through her consulting company Agency for Games.

Her infamous Dragon's Crown review, that gave the game a strong penalty for its art style being “alienating and gross in its depiction of women” has sparked significant controversy — which may be manufactured — and has a strong appearance of being incited for clicks.

Review editor when Polygon's 9,5/10 Simcity 2013 review was released among heavy criticism, and steadily defended the game's reviled always-online DRM, insisting Simcity couldn't function offline even after it was proven it could, and accused gamers who advocated for the DRM's removal to be "an agenda-driven anti-online movement".

His infamous Bayonetta 2 review, that gave the game a strong penalty for its “blatant over-sexualization” has sparked significant controversy — which may be manufactured — and has a strong appearance of being incited for clicks.

Spends a large chunk of his Witcher 3 review complaining about its "oppressively misogynist" world and lack of "a single non-white humanoid". The large amount of controversy incited by this review has an appearence of being manufactured and being incited for clicks.

Wrote about Mattie Brice and her game “Mainichi“ on two seperate occasions, without disclosing their close friendship nor the financial conflict of interest in the Overland article.

Wrote at least three times about Zoe Quinn—plus a fourth article at Unwinnable, a blogpost and an academic paper. His articles—with the possible exception of the Unwinnable article, behind a paywall—don’t disclose his relationship with Quinn, as well as his (small) contribution to one of her crowdfunding campaigns. Their social media also suggest a very friendly relationship—which includes Keogh promoting Quinn with extreme frequency, defending her in spats, and apparently multiple meetings despite Keogh being stationed in Australia and having to travel to the USA in order for a meeting to take place. Keogh is also listed in the credits of Quinn’s Depression Quest.

Infamous gone-on-a-tangent Rock Band 4 preview, stating he deliberately didn’t even play the game at a press event, didn’t "give a stuff about" it and didn’t even like rock music, even stating "all games are stupid". Preview generated criticism from multiple sources, and even mockery, prompting Campbell to reply he had been misunderstood. The preview would later on win the Society of Professional Journalists’s Kunkel Award for Worst Story of 2016.

Attacked Grand Theft Auto 5 for being a misogynistic game, since players can kill prostitutes in it, and endorsed the game's Australian sales ban. This editorial sparked criticism from multiple and different sources, mostly focused on the facts that this violence is not mandatory, and the game allows you to kill any character in it.

Sensationalist editorial on Polygon accusing game The Witcher 3 of racism. Both his article and Polygon's similiarly-themed review by Arthur Gies incited very strong criticism, mostly due to singling out a game based on 13th century Polish mythology for its lack of people of color. Moosa equated criticism of his position to white supremacist organization Stormfront, but eventually partially withdrew his accusations of racism.

Covered games by Harmonix in at least nine occasions without disclosing his relationship with Harmonix PR Nick Chester — who was not just the Editor-in-Chief of Destructoid while Sarkar was employed there and the person who hired him in the first place, but remained on friendly terms with Sarkar, frequently hanging out together with him — in violation of Polygon's ethics policy.

Wrote nineteen articles about Disney Infinity, and namedropped it in at least eight more across two years, without disclosing his friendship with John Vignocchi, Disney Infinity’s exective producer and current vice president of Disney Interactive.

Wrote about fellow journalist Leigh Alexander without disclosing their admitted friendship. He also wrote two times about Sunset, which Alexander was involved in through her consulting company Agency for Games.

In order to publish his article about the launch of the Xbox One as fast as possible, he originally published completely wrong information — the article being treated as a developing story despite all the information being available since the start.

Covered Harmonix in no less than six articles without disclosing her very friendly relationship with Harmonix employees John Drake, Annette Gonzalez and Nick Chester.

Polygon published an excerpt of the controversial book WTF is wrong with video games? by Phil Owen, in such a manner that it substantially took the form of undisclosed native advertising. After receiving backlash for it, Polygon amended the byline, revealing the article originally labeled as written by “Polygon Staff” was actually the store product description written by the book’s author Phil Owen himself. Polygon later responded to complaints on GamePolitics.com, framing the critics as if they had been confused by the byline change, not understanding how book excerpts work.

Claimed that harassment caused Brianna Wu to leave her home, despite her history of farfetched claims and the ambiguous circumstances of the doxing, and never updated the article despite the the very strong evidence that, apart from an already planned weekend at Comicon, she had never actually left her home, as well as the numerous outrageous claims and apparent false flags that mined Wu’s credibility afterwards.

Her report on a new set of Pokèmon cards incorrectly describes it as a re-release of the original starter kit—seemingly including some made-up data. The article was never corrected despite her having been publicly informed about the mistake, and was taken as a source and echoed on numeros outlets, some of which did issue corrections.

Wrote two times about the Games for Change organization, originally without disclosing that he had just taken an unpaid volunteer position as a member of the nonprofit corporation’s advisory board. Promptly added disclosures once he was made aware of the issue.

After dismissing people accusing him of having a personal relationship with Zoe Quinn by saying he had never written about Quinn, he wrote about her without disclosing their relationship. They have clear financial ties, with Kollar having backed Quinn’s Patreon and one of her crowdfunding campaigns. Furthermore, they appear to have a very well developed personal relationship, including the discussion of possible meetups and extremely frequent promotion of Quinn on Kollar’s Twitter account.

Co-authored an article about Christine Love, without disclosing a rather evident personal relationship with Love. Some comments Kopas published shortly after this was publicized seem to be a response—claiming the apparent conflict of interesting is a form of “networking” and people bringing it up are “conspiracy theorists”.

Wrote about Mattie Brice, without disclosing an apparently reasonably close personal relationship, involving mention of at least three meetings preceeding the article’s publication. Lien appears to have deleted her Twitter interactions with Brice.

Wrote about fellow journalists Dan Golding and Brendan Keogh, without disclosing an apparently rather friendly personal relationship with both of them, involving multiple meetings. Lien appears to have deleted her Twitter interactions with Golding and Keogh.