If you absolutely want to try, use a secondary iOS device, never enter your real Apple ID password, and scan the file with a security tool before sideloading.
Here’s a on the topic, focusing on what the game was, why the IPA is sought after, and the legal/safety considerations. WWE Immortals IPA (2021): What You Need to Know What Was WWE Immortals? WWE Immortals was a mobile fighting game developed by NetherRealm Studios (makers of Injustice ) and published by Warner Bros. Interactive Entertainment. Released in 2015, it featured WWE Superstars reimagined as fantasy characters (e.g., "Demon Kane," "Cyber John Cena") with special moves and gear. Wwe Immortals Ipa -2021-
I notice you're asking about a file, likely referring to a modified or archived version of the now-defunct mobile game. If you absolutely want to try, use a