Sony Acquisitions:
May 21, 1993 - Psygnosis
December 1, 2000 - Bend Studio
January 22, 2001 - Naughty Dog
August 7, 2002 - Incognito Entertainment
December 7, 2005 - Guerrilla Games
January 25, 2006 - Zipper Interactive
May 15, 2007 - Sigil Games Online Inc
September 20, 2007 - Evolution Studios, Bigbig Studios
March 2, 2010 - Media Molecule
August 2, 2011 - Sucker Punch Productions
January 8, 2019 - Audiokinetic
August 19, 2019 - Insomniac Games
June 29, 2021 - Housemarque
July 1, 2021 - Nixxes Software
September 8, 2021 - Firesprite
September 29, 2021 - Fabrik Games
September 30, 2021 - Bluepoint Games
December 10, 2021 - Valkyrie Entertainment
February 1, 2022 - Lasengle (gaming division of DelightWorks)
March 21, 2022 - Haven Studios
July 15, 2022 - Bungie
August 29, 2022 - Savage Game Studios
That is every video game acquisition by Sony to date. That is 22 acquisitions in almost 29 years, and over half of those were within the last five years. This is almost identical to Microsoft who is at 19 video game acquisitions in the same time frame (assuming the Activision/Blizzard acquisition goes through).
Microsoft Acquisitions:
January 11, 1999 - FASA Interactive
April 19, 1999 - Access Software
June 19, 2000 - Bungie
December 5, 2000 - Digital Anvil
May 3, 2001 - Ensemble Studios
September 24, 2002 - Rare
April 6, 2006 - Lionhead Studios
October 12, 2011 - Twisted Pixel Games
June 5, 2012 - Press Play
November 6, 2014 - Mojang
June 11, 2018 - Ninja Theory
June 11, 2018 - Undead Labs
June 11, 2018 - Compulsion Games
June 11, 2018 - Playground Games
November 10, 2018 - inXile Entertainment
November 10, 2018 - Obsidian Entertainment
June 9, 2019 - Double Fine Productions
September 21, 2020 - ZeniMax Media
January 18, 2022 - Activision Blizzard