The bold is to indicate companies I would consider to have serious political or legal complications if purchased. Not companies that could cause an uproar – like say Take 2, but companies where monopoly concerns and national government concerns come into play. I did my best to sort publishing deals, IP ownership, etc. None-the-less, I am certain mistakes have been made.
Apple - Cash $194B - Market Cap - $1.92T
Facebook - Cash $58B - Market Cap - $726B
Alphabet (Google) - Cash $117B - Market Cap - $981B
Amazon - Cash $71.4B - Market Cap - $1.55T
Sony - Cash $31B - Market Cap - $95B
MS - $136.6B - Market Cap - $1.52T
Nintendo - $75.3B - Don't think I need to list them.
Activision-Blizzard - $63.8B - Call of Duty series, Crash Bandicoot series, Guitar Hero series, Skylanders series, Spyro the Dragon series, Tony Hawk's series, Diablo series, Hearthstone, Heroes of the Storm, Overwatch, StarCraft series, Warcraft series, and the Candy Crush Saga.
Valve - $52.5B - Steam, Half-Life, Left 4 Dead, Team Fortress, DOTA, Counter-Strike. (Allegedly, from Sam at ArsTechnica - MS has continually attempted to buy and Newell has continually said no.)
EA - $37.9B - FIFA, Madden, Sims, Bioware, NHL, Star Wars, Respawn, Battlefield, NBA Live, UFC, Need for Speed, Popcap, and Dice.
Take-Two Interactive - $19.01B - 2K, Rockstar, GTA, Red Dead, Irrational Games (Bioshock)
EPIC - $18B – Tencent is a heavy investor (~40%) but is allegedly pretty hands off with gaming development. It appears Fortnite and a few mobile games are their only IP.
Bandai Namco - $16B - Price is reflextive of Bandai Namco Holdings which is, apparently, the largest toy manufacturer in the world. Otherwise I would list them with Sega and Paradox. - Time Crisis, Tekken, Soul Calibur, Katamari Damacy
CD Projekt - >$10B Company considered to be going nowhere but up. P/E projected to double in 3 years.
Ubisoft - $10.5B – Red Storm (Tom Clancy), Assassin's Creed, Watch Dogs, Far Cry, Anno, Just Dance
Square Enix - $7.6B – Kingdom Hearts, Final Fantasy, Dragon Quest, Nier Automata, Tomb Raider, DeusEx, Thief
Embracer Group - $7.2B (THQ, Koch Media, Saber), Darksiders, Remnant: From the Ashes, Kingdom Come: Deliverance, Metro Series, Destroy All Humans
Capcom - $6B – Monster Hunter, Okami, Resident Evil, Devil May Cry, Streetfighter, Dragon’s Dogma, Dead Rising
KOEI Tecmo - $5.8B – Hyrule Warriors, Ninja Gaiden, Nioh, Fatal Frame, DOA
Konami - $5.3B – Pro Evolution Soccer, MGS, Contra, Castlevania, Silent Hill
Roblox - 4-8B according to the Azbat linked article below. I know nothing about Roblox.
Warner Bros Games - $4.5B (I simply listed the highest speculated price from the previous rumors. Potential license transfer issues. Rumor that the max bid was only $2B.)
Paradox Interactive- $3.2B - Battletech, Hearts of Iron, Europa Universalis, Cities Skylines – Note: Sorting out this company’s IP from its developers, naming rights, etc, was a nightmare. Take all these with a grain of salt.
Sega - $3B – Sonic, Bayonetta (½ owned by Nintendo), Streets of Rage, Panzer Dragoon, Football Manager, Phantasy Star, Yakuza, some of Shenmue III (this one is confusing)
Gearbox – Privately held. This felt about the correct spot. As near as I can tell, the only IP they actually own is Borderlands. The rest are developer deals for others properties.
Stardock - $135M (Private. Used really dirty math based on old revenue numbers. Company has had its ups and downs as of late it seems.) Star Control, Ashes of the Singularity, Galactic Civilizations, Sins of a Solar Empire, Offworld Trading Compnay
Daedalic - $100M (Management owned after a buy out as Bastei Lubbe wanted to divest. BL declared the business model unsustainable. Hard to determine any real value. In financial trouble. LOTR License.) Desperado series and Shadow Tactics :Blades of the Shogun appear to be under Mimimi Games. I have no idea what IP they actually own.
Bloober - Public - `$80m. - Medium, Observer. Would be a nice pickup and Bloober has, allegedly, been in acquisition talks for awhile.
GSC Gameworld – Private. Perhaps running on the financial edge. Ukrainian developer of Stalker.
Platinum Games – Private. While making excellent games, they do not appear to have any original IP. Although resurrecting Scalebound doesn’t appear out of the question.
Moon Studios – Private. Ori.
Asobo Studio – Private. MS Flight Simulator
Tonic Games Group/ Mediatonic - Private? Can find nothing. Fall Guys