As someone who has spent countless hours exploring the vast world of Arknights Endfield, I can say that diving into the deeper layers of this game is truly an exciting experience. When encountering mysterious messages like "It's really deep down here... What is this place?" it sparks a real sense of curiosity and adventure. One of the things I love about Endfield is how it integrates lore and gameplay seamlessly. The mention of "Enter the space underneath" hints at secret areas or underground levels players can uncover, often filled with unique challenges or story elements. Level 90 characters like Kristofer Andre and others mentioned are crucial for tackling these parts due to their advanced skills. Exploring these hidden spaces often involves strategizing with your squad, utilizing auto-play features cautiously, and paying attention to cryptic clues scattered throughout the game world. The hashtags like #ZerothDirective remind me that the game encourages exploration beyond just combat, focusing on uncovering the deeper narrative layers. For new players, I recommend paying close attention to your surroundings and dialogue prompts, as they often provide subtle hints to these secret areas. Engaging with community content can also enhance your understanding as many players share their discoveries and tips. Overall, delving 'really deep down here' isn’t just about progressing in levels but immersing yourself in the intricate storyline and hidden gems Arknights Endfield has to offer.