Complex sentence: As a metafictional game, the game has the player interact with what appears to be an old arcade cabinet game called "Pony Island", but soon discover the game is corrupted by a satanic being which is trying to claim the player's soul for itself.
Split into simpler sentences: As a metafictional game, the game has the player interact with what appears to be an old arcade cabinet game called "Pony Island". The player soon discovers the game is corrupted by a satanic being which is trying to claim the player's soul for itself.