Power brick, USB-C cable, external battery, earbud headphones.
Sometimes I also add a folding bluetooth keyboard, mini bluetooth mouse, and USB drives, but that's only when I'm gonna use the Deck as a computer for 3D modeling or typing tasks.
I have nothing against the original, I used it for a few months and it works great. I switched to a different case when I got a different charger and other cords to use with the external battery I added to the 'entourage' for the Deck. The original case didn't have the room for all that, and things like earbuds didn't like to stay in the elastic hollow of the original. Wasn't a big deal, but it was a noticeable change after switching cases.
I loved Deus Ex Human Revolution, it was my intro to the series and still one of my favs. I woild also recommend something a little more sandbox, like Minecraft or Lightyear Frontier, just for the sheer time sink these games can be. Farming and building can make you lose track of hours at a time, great for travel.
I could also recommend something like Be my Hoard. Trying to get over an hour on a run is a fun way to burn an hour, if you like rouge-lite styles.
If you like driving, something like American Truck Simulator or Euro Truck Simulator is another great time sink.
The issue some of us take with that is no, we did not all decide we needed more racism and hate. In fact, more and more evidence is being found that shows the entire thing was rigged, and the true majority decision was not acknowledged by the folks who had mostly been behind the scenes before.
Time to jizz! Everybody, it's jizz time!