Most potatoes will run any RenPy visual novel. Unity games, and unreal games, it entirely depends on the game. Some are made with performance in mind, while others splurge on memory usage like it's a free commodity. No saying whether you're gonna be able to run every unity/unreal game. This tablet uses a low tier CPU chip which won't compare to a full size chip in a desktop. I'm not familiar with Apollo Lake so maybe somebody with one can share. It doesn't specify graphics so I'm guessing integrated only. Which means it relies heavily on the CPU.
I'd say you can't run most unity or unreal games on this. Which is expected, because tablets and low end laptops are only cheap because their usage of small CPU chips and use of integrated graphics. That's kinda what sets the price points apart, and the distinction between a tablet and PC.