Another set of collectibles are the 10 Doctor's Notes, which provide additional lore and backstory about the island's experiments and the origins of the Blood Dragons. These notes are typically found within Omega Force facilities, research labs, or other story-relevant locations. They often appear as glowing data pads or documents on desks.
Collecting all Doctor's Notes unlocks the 'Konnichiwa' achievement. While they don't offer direct gameplay benefits, they enrich the narrative and provide context to the bizarre events unfolding around Rex. Keep a keen eye out for them during main missions and when exploring Omega Force strongholds. They are usually placed in areas that require a bit of exploration off the main path but are generally not as hidden as the TV sets. Reading them can also provide hints about enemy weaknesses or environmental hazards.