Still discovering new things in Ratchet and Clank (2002)
I'm currently replaying RaC for the 100th time (played it the first time when I was about 8 years old, now I'm almost 30) and there are still trivial things I missed or never saw yet: helpdesk messages and mission descriptions.
Helpdesk messages: Many messages are only shown if the player fails to do a specific tasks (or idles long enough around those tasks) or if the player doesn't own the required gadget for the next part of the game. This came to my mind when I was playing on Novalis a couple days ago and going to the lake behind the ship where you have to open the door by using your wrench and running around the bolt. I failed that purposely multiple times and unlocked a helpdesk message about what to do in order to open the door. I can't even find this message in the official "Ratchet & Clank scripts Wiki". Also, only the first sentenced was shown in the subtitles, but the helpdesk voice was saying two sentences (I'm playing in German language). I probably never saw that message in my life or heard the helpdesk voice say those sentences. Or it is possible I saw that as a kid and since then never again and just forgot about it.
Mission descriptions: I never paid attention to the missions and their descriptions since I already know about everything and what to do. Many of the descriptions not only tell you what to do, but they sometimes include a little bit of lore as well. But once you complete a mission, it just says "Mission complete" and there is no way to read the description anymore. Some missions are also only shown for a very brief period of time. For example on the Blarg Tactical Research Station: there is a mission about exploring the Blarg warship and once you stand in front of the big red button, you unlock a new mission to destroy the Blarg warship. Most people don't even see this description, because they just play through the section in a matter of two minutes and that's it. Just yesterday, I also missed the description to defeat the boss on Qwark's Headquarters, because the game just throws you inside the boss battle and it didn't come to my mind there was a new mission to defeat it.