That era in gaming had many releases that are still considered among the best games of all time, that pioneered trends that reshaped the whole industry. Almost every year had at least a couple such titles.
2004 GTA San Andreas, Half-Life 2
2005 God of War, Need For Speed: Most Wanted
2006: TES: Oblivion, Gears of War, Okami
2007: Call of Duty 4, Portal, Bioshock
2008: Dead Space, Left 4 Dead
2009: Batman: Arkham Asylum, Uncharted 2
2010: Read Dead Redemption, Bayonetta, Starcraft 2
2011: Skyrim, Portal 2, Dark Souls
2012: XCOM, Guild Wars 2, Diablo 3, Far Cry 3
2013: GTA V, The Last of Us, DOTA 2
Red Dead Redemption still hasn't even come to PC yet, it's due out this year!
Okay, so I was the one who narrowed it to talking about PC games, but if we look at console gaming then it has got consistently cheaper.
Sonic & Knuckles cost around $60 in 1994 money, that's about $130 in today's money.
Games have got vastly cheaper, for decades they were consistently around $60 and it's only recently they've crept up.
But I'm not here to argue about 2006. I'm making a point that contemporary games are worse. I don't think it's even possible to make such a list for recent years. We get 1, at most 2 good games per year - and most of them are straight sequels with little to no innovation over their pre-pandemic predecessors. And not just on PC - across all platforms. Seriously, try to write down this list for the last 5 years and tell me it's not drastically worse than my list - and my list is of the allegedly worst period for gaming!
As for the prices. Most games were $50 until 2005 or so. A lot of PSX titles were $40. Then there's the trend of dicing up content into $10-20 DLCs in increasing quantities, meaning you're getting less of a game per purchace if you only buy the base version. A different kind of shrinkflation.
Get some fresher data mr LLM.