If i want to play arknights endfield, which device should i create?

Create an arm64 device, preferably with a recent Android image, because most modern games are ARM-only and won’t run on x86/x86_64 devices. Use an official recipe or create a custom recipe with an arm64 image, then install the game on that device; if it is not compatible in Google Play, try the compatibility article.

Most games also need Android 12 or higher for the best support, and gamepad support is available on Android 12+ in Desktop. Genymotion is a professional tool for app development and testing, not a gaming emulator, so compatibility is limited.