Most of Steam games rely on Proton for support. You need to enable it in Steam’s settings, under Steam Play.
You can check how well a game runs on protondb. Some games may require additional steps to be playable (using a specific version of Proton, installing something), protondb reports most of the time include required information.
Since the regular points have already been covered by other people, I’ll add one thing that I like:
Two batteries. The external one is drained first, and it can be replaced while the laptop is running, because there’s an internal battery. I have 24Wh internal, a 16Wh external (it’s old, originallly it was 24Wh) and 72Wh external, in a 12 inch laptop (achievable because 72Wh battery sticks out and acts like a stand), giving me more battery life than anything else without an external power bank.