FlashStorage.games offers a version that does not require the original Flash Player.

Some gaming portals use emulators like Ruffle to run the game directly in modern browsers without needing a standalone download:

Some fansites provide the direct .swf file. To play these, you will need a standalone Flash player or a browser extension that supports local file playback. Game Features and Playable Aliens

Ben10 Duel of the Duplicates | Part 2 - Snare-Oh (Armory Level)

Guide to Ben 10: Duel of the Duplicates Download and Play is a classic action-platformer based on the Ben 10: Omniverse series. Originally a Flash-based browser game on the Cartoon Network website, it tasks players with defending the Plumber Base from an army of evil alien clones sent by Albedo. Where to Play and Download

Since Adobe Flash Player was discontinued, the original web version is no longer natively supported in most browsers. However, you can still access the game through several reliable preservation methods:

NuMuKi provides an emulated version that works on most modern desktops.