N150 isn't really what you'd want to use for a gaming machine. At a budget of mid $300s - the best (new) Mini PC you're going to find right now is probably this unit[1] with a Ryzen 7 7735U (680M iGPU) and 16GB RAM. Not the most powerful device - but I have a similar one I use to play emulator games, indie games on steam - throw Steam OS on it and it's a great living room device. Expand that budget to $530 and you can get this guy[2] with a Ryzen 7 255 (780M iGPU) - which will play modern games (on low settings for many).

[1] https://www.amazon.com/dp/B0GGM6BKN9 [2] https://www.amazon.com/dp/B0FX2TV3HX

Shameless plug - I methodically rank the best possible Mini PC deals on https://MiniPCs.zip for this exact purpose.