By the numbers, complete "official" games in my collection includes:
Atari 5200 - 46
Atari 2600 - 23
Atari Jaguar - 19
Atari Lynx - 54
Microsoft Xbox - 1002
Microsoft Xbox 360 - 567
Microsoft Xbox One - 341
NEC PC Engine - 251
Nintendo 3DS - 300
Nintendo DS - 596
Nintendo Gameboy - 211
Nintendo Gameboy Advance - 513
Nintendo Gameboy Color - 169
Nintendo Gamecube - 305
Nintendo N64 - 165
Nintendo NES - 489
Nintendo Super NES - 532
Nintendo Switch - 280
Nintendo Wii - 611
Nintendo WiiU - 120
Sega 32X - 16
Sega CD - 121
Sega Dreamcast - 272
Sega Game Gear - 163
Sega Genesis - 508
Sega Master System - 105
Sega Saturn - 440
Sony Playstation - 1962
Sony Playstation 2 - 2047
Sony Playstation 3 - 567
Sony Playstation 4 - 1546
Sony Playstation PSP - 632
Sony Vita - 185
Total = 15,156
I've collected quite a few homebrew and fan translated games as well and most are at least boxed.
I have a bunch of Amiibo toy's, but I think I have all the toy's and expansions for Disney Infinity, LEGO Dimension, Starlink, and Skylander's games
The November 2020 issue 331 of Gameinformer magazine claimed the world's largest collection of more than 11,000 video games was sold in 2014. I read that and thought that number was probably too small. I doubt my collection would put me in the top 1,000 collector's world wide. But what's more interesting than numbers is what's in your collection and why.