Oh!because they sell their games on steam, "based on information and belief" agreed to this "mfn" clause in their contract with valve (short for most favored nation, but in this case basically devs cant have a lower price on a different storefront if they sell on steam), and then those games were bought by the plaintiffs and they were "forced to pay supracompetitive prices for those pc games"
learn a new word every day
Well RIP Steam I guess, better download all my games as long as I can