These would be mine

5. Sega - Sonic the Hedgehog, Virtua Fighter, Shenmue, Vanquish, Bayonetta, Yakuza, Altered Beast and Shinobi.

4. Square Eix - Final Fantasy, Xenogears, Chrono, Parasite Eve, Tobal, Vagrant Story and Tomb Raider (it is Square Enix now).

3. Sony Computer Entertainment - Crash Bandicoot (the first four), God of War, Gran Turismo, The Last of Us, Uncharted, MediEvil, The Legend of Dragoon and Dark Cloud.

2. Capcom - Street Fighter, Crossover Fighters, Ghosts 'n Goblins, Resident Evil, Dino Crisis, Darkstalkers, Dead Rising, Onimusha, SNES Aladdin, Devil May Cry and Strider.

1. Nintendo - Mario,  Super Smash Bros., Zelda, Metroid, Donkey Kong, Pokemon, Wii, Fire Emblem and Xenoblade.

1) Nintendo.

2) Ubisoft ( haters gonna hate )

3) RockStar

4) Capcom

5) Platinum Games

1. Sony Computer Entertainment (Crash Bandicoot 1-3, Uncharted, God of War, Ratchet & Clank...)
2. Bandai Namco (Tekken, Dragonball, One Piece, The Witcher 3...)
3. Take-Two Interactive (GTA, Red Dead Redemption...)
4. Ubisoft (Assassin's Creed, Rayman, Prince of Persia...)
5. Activision Blizzard (Call of Duty, Destiny...)

Aren't both developers and not publishers?

1. Nintendo (Pretty much all their games)
2. Namco Bandai (Tales of games are my favorites, but I do like their other franchises)
3. NIS America (Everything as well)
4. Koei Tecmo, just for Gust Co. ( Atelier, etc.)
5.Capcom (Monster Hunter, Ace Attorney, Megaman)

1) IF / Compile Heart
2) Firaxis (Take-Two)
3) Ubisoft
4) Valve

I'll post a number 5 later.

1.Nintendo
2.Capcom
3.Square Enix
4.Sony
5.Sega

That is very similar to my list.

1. Nintendo
2. Sony
3. Ubisoft
4. Squenix
5. Take-Two