EA
- Battlefield V is going to have battle-royale mode.
- More sport games, including FIFA 19, NBA Live 19, and Madden NFL 19.
- Star Wars Battlefront II DLC, adding in elements from the Clone Wars.
- Very slight news on Star Wars: Jedi Fallen Order.
- Command & Conquer Rivals, the real-time strategy game returns as a mobile game.
Microsoft
- Halo Infinite, the new game in the Halo franchise.
- Fallout 76 is going to be 4x bigger than Fallout 4.
- A glimpse of Kingdom Hearts 3.
- The Division 2 is going to graphically better than the previous title.
- A further look in the dark story of Shadow of the Tomb Raider.
- An expansion of the Xbox exclusive, Cuphead.
- The long awaited sequel of the hack-n-slash game is revealed, Devil May Cry 5.
- 3 Gears of War games, including Gears 5.
- Cyberpunk 2077.
Microsoft was no doubt the star of the show. So many Xbox exclusive games, fan favorites and all. Most of the reveals were spectacular, and gave gamers a taste of what's to come in the future.
Bethesda
- Doom Eternal, the sequel to the Doom reboot.
- Quake Champions, including a free-to-play session.
- Wolfenstein: Youngblood is going to be a co-op game.
- Elder Scrolls VI returns to its RPG roots.
Bethesda didn't do to bad in the conference, but the reveals where nowhere near as massive as Microsoft. However there were still games to be excited.
Square Enix
- More info on some Square Enix games, Shadow of the Tomb Raider, and Kingdom Hearts 3.
- A crossover event with Final Fantasy XIV and Monster Hunter World.
- Showing the gadgets, weather, and other elements for Just Cause 4.
- A glimpse of Dragon Quest XI.
For Square Enix's first E3 conference, I say it was okay. However there were not many new games. Mostly expansions to previous games is what the conference was about. And still no word on FFVII Remake.
Ubisoft
- Just Dance 2019.
- A deeper look in The Division 2.
- Starlink: Battle for Atlas, a Star Fox tie-in with the game.
- The Crew 2, with Open beta details.
- Beyond Good and Evil 2.
- Assassin's Creed Odyssey, now set in ancient Greece, have gender choices, and branching dialogue.
Ubisoft's conference was pretty good. Seeing more sequels to popular Ubisoft games always brings a smile to gamers faces.
Sony
- A glimpse of The Last of Us Part 2.
- A bigger look of the samurai game Ghost of Tsushima.
- Call of Duty: Black Ops 4 has a Black Ops Pass, to give players more content sooner at a steady pace.
- Kojima's game Death Stranding gives more detail about the characters and settings, also more celebrity appearances.
- A lengthy demo of Marvel's Spiderman, showing off the fighting mechanics.
- The long awaited Resident Evil 2 Remake announced for a Early 2019 release.
Sony did pretty well at some of the reveals, including Spiderman and Resident Evil 2 Remake. However some games were somewhat hinted or leaked ahead of time, and were inevitable.
Nintendo
- Daemon X Machina, a mech-battling game.
- Fire Emblem: Three Houses.
- Fortnite: Battle Royale is going to be on the Switch.
- Super Mario Party, another installment of the Mario Party games, now coming on the Switch.
- Super Smash Bros. Ultimate, possibly a new game, will feature over 64 characters with some changes to the fighting, for the switch.
Nintendo's Treehouse had the usual trope of supporting their current console with many popular games being ported. So it was okay.
Overall the conferences were pretty good. All the studios had a number of announcements. Some good, some average. While we got a lot of information on some games, there were others that were just teasing. But this year seems like another good year for games.