DOOM

So many mods

So many difficulties

Beyond that I’d say Half-Life because that’s also a good classic.

It’s cellular providers who restrict bootloader locking generally. But you’re right but that would go against the grain as the Pixel series are designed to be the flagship for AOSP

This is it.

I switched to Pixel phones ordered from Google. I can replace the software with whatever and not worry about breaking an eFuse warranty.