E3 2021参展厂商更新，新增动视贝塞斯达万代南梦宫等
越来越多厂商参展了。
E3 2021 官网更新了参展商的信息，新增了动视、万代南梦宫、贝塞斯达、Epic、世嘉等厂商。截至目前具体的参展厂商名单如下：
| 厂商名称 | |
| Activision Publishing, Inc. |
NCSOFT |
| Amazon Game Studios | nDreams |
| Bad Button Studio | NEXT LEVEL RACING |
| BANDAI NAMCO Entertainment America Inc. |
Nintendo of America Inc. |
| Bethesda Softworks | NVIDIA |
| Capcom USA, Inc. | PureArts |
| Click Entertainment | Oculus from Facebook |
| DvG | RDS Industries Inc. |
| Deep Silver, Inc. | Rebellion |
| Epic Games Inc. | SEGA |
| Funcom | Square Enix, Inc. |
| GAMELOFT | Take-Two Interactive Software |
| GFUEL | Tastemakers |
| GTR Simulator | TECHNISPORT |
| GungHo Online Entertainment America |
THQ Nordic |
| HORI USA | Ubisoft Entertainment SA |
| Hyperkin, Inc. | UCC Distributing Inc |
| Kalypso Media Group | UnnamedVR by Paracosma |
| KontrolFreek | Warner Bros. Games |
| Limited Run Games | Xbox |
| LGA Enterprises | XSEED Games |
| Xsolla | |
来源：E3 2021