Song: Jump by Van Halen from 1984, 1984, Warner Bros.
Mrs. Gilmore is wearing a tshirt showing one of the many variations of the album cover for Synchronicity by the Police, 1983
As Wade picks up his neck apparatus from the wall, there's an iPOD classic without the faceplate
The neck apparatus was hanging on a Competition Pro 5000 joystick. These had 9-pin connectors and were compatible with the Atari 2600 and other hardware.
Wade takes off his glasses and puts them on a Masters of the Universe lunchbox next to a packet of PopRocks candy. There's a Tootsie Roll, some Nutter Butters cookies, a crushed Carl's Jr cup
There's a bunch of stickers near these but I've only made out the GSS sticker so far
On Wade's goggles, there's a Space Invaders sticker from the arcade game from Taito, 1978
Entering the Oasis, we first see Minecraft World after the long shot of a bunch of worlds, based on the game from Mojang Studios, 2011
Uncle Henry and Auntie Em's house from The Wizard of Oz, 1939, directed by Victor Flemming, is flying around in Hurricane Hang Gliding
Batman, from the 1989 movie of the same name, directed by Tim Burton, seen climbing on Mount Everest
Planet Ludis flashes by, a reference from the book which is otherwise almost completely absent from the movie
Wolfman, The Wolfman, 2010. I say this version because of what he's wearing
A girl in a white and (grey? blue?) striped dress changes into The Flash, DC Comics
Ray Harryhausen Cyclops from the 7th Voyage of Sinbad, 1958, directed by Nathan H. Juran
Borg? (off to the left of the cyclops)
BattleToads?
RoboCop from the movie of the same name, 1987, directed by Paul Verhoeven
Marvin the Martian from the Looney Tunes cartoons
World of Warcraft orc?
Sonic the Hedgehog from the Sega video games is lining up for the gate
Catwoman from Batman Returns, 1992, directed by Tim Burton
Tracer from Overwatch video game from Blizzard
Grandma from Looney Tunes?
Possibly Nightwing from DC Comics
Hello Kitty, Badtz-Maru, and Keroppi running along behind and to the left of Parzival
Not mentioned in the movie but covered pretty well in the book, Parzival, the name of Wade's OASIS avatar, is taken from the knight of Arthurian legends Parcifal or Percival, the original hero in the quest for the Holy Grail
Parzival's holster is a Han Solo holster with a Thundercats logo on the buckle but it appears that the holster is empty
Attikus from the video game Battleborn walking away from the camera POV
Protoss zealot on the left, all gold, Starcraft video game from Blizzard, walking with what looks like an IOI agent
There's a guy in all black with a black fedora and huge gold chain around his neck walking away from the camera - this is the first time we see him but he shows up a lot. who?
Planet Doom from Voltron: Defender of the Universe series, 1984, by World Events Productions
First zooming in on Planet Doom, there is a huge clash of two armies with giant scorpions from Ultrabots, 1993, by Novalogic coming from the left and men mounted on ostriches coming from the right similar to the arcade game Joust, 1982, from Williams Electronics
Aech's gun is an MA5B Assault Rifle from HALO, the video game
Freddy Kruger, from the Nightmare on Elm Street movies, second onscreen kill by Aech
Third kill by Aech is ???
Fourth kill by Aech almost looks like Man-Bat, DC Comics
Duke Nukem from the video game franchise of the same name from Apogee Software Ltd., fifth onscreen kill by Aech
Some kind of Emoji-faced guy (the face keeps changing)
Zergling from the video game Starcraft, 1998, from Blizzard
Aech grabs an EM-1 Rail Gun from Eraser, 1996, directed by Chuck Russell
Scorpion from Mortal Kombat, 1992, from Midway Games, killed by Daito
Skeletons climbing the hill reminiscent of Harryhousen movies or Army of Darkness
Blob?, from Marvel Comics
Hydralisk, Starcraft
Vegeta?, Dragon Ball Z anime
Stars and Stripes Jim Raynor from the video game Starcraft Heroes of the Storm, 2015, from Blizzard Entertainment
I've seen it suggested that the robot Raynor shoots (the mom in the bathrobe's avatar) is a skin from Fortnite but I'm not able to place it
Posters on the wall behind the girl: Donkey Kong Jr, Bangles album All Over the Place, 1984, Columbia Records, Grace Jones album Nightclubbing, 1981, Island Records, others?
A blue Carebear (can't see which)
Jason Voorhees from the Friday the 13th movies
Song: Everybody Wants to Rule the World by Tears for Fears from Songs from the Big Chair, 1985, Mercury Records
Donatello and Leonardo on the left, looks like the 2014 and 2016 movie versions of TMNT
World of Warcraft female orc?
Behind the orc, there's someone wearing normal clothes but has a silver mask and helmet on that looks very familiar but I haven't yet figured out why
Doc Brown, back from the future outfit, Back to the Future, 1985, directed by Robert Zemeckis
A soundbite of Toccata and Fugue in D Minor by J. S. Bach plays at the start of the funeral scene
Movie note: 1972 is the mint date on the quarter in focus on Halliday's right eye and is also Halliday's birthday. The quarters in the book were minted in 1984 but no reason is given for this date.
James Halliday's funeral is Star Trek themed including delta badges and wreath in the shape of the USS Enterprise
Halliday's casket is a MkVI photon torpedo from Star Trek II: The Wrath of Khan, 1982, directed by Nicholas Meyer, which is draped with a flag of the Federation of Planets similar to how Spock's casket appeared at the end of the same movie.
Halliday is wearing a pin on his lapel of the classic Simon electronic game, 1978, from Milton Bradley
Halliday sits up in his casket to a creepy music bite - this seems to mimic Dracula sitting up in his coffin in the old Beli Lugosi Dracula movies but I can't find a reference