The ASA recently found that Funplus, developer of King of Avalon: Dragon Warfare should only use images from its own game in advertising.
Through its agency, the developer actually promoted a Tweet using a screenshot from a different game. Though this is a UK regulator, the rule would certainly be the same in the US.

/Passle/5a0ef6743d9476135040a30c/SearchServiceImages/2026-07-01-19-44-03-878-6a456e03eb7326b3e7a5f2b4.jpg)
/Passle/5a0ef6743d9476135040a30c/MediaLibrary/Images/2026-06-30-11-07-25-174-6a43a36d43336dc684d44618.jpg)
/Passle/5a0ef6743d9476135040a30c/MediaLibrary/Images/2026-06-28-22-02-53-651-6a419a0d8d39afd7c04a6903.jpg)
/Passle/5a0ef6743d9476135040a30c/SearchServiceImages/2026-06-25-16-08-50-308-6a3d52929d445c98542a2bd4.jpg)