Atari 2600 analysis via Let's Play Solaris + Breaking Down "The Story of Mel"
lparchive.org
lparchive.org
First half is a playthrough of a quite finicky and fairly impressive-for-the-system game (though, let's be fair, nearly anything but Pong on the 2600 is impressive in some way).
Second half is an in-depth look at how 2600 coding works. See also: Impressive. Highlights include: A debugger/disassembler that fits all of RAM readably in less than a quarter of the window, the use of pixels as a unit of time, and upside-down graphics as a speed hack.
Ends with a bit on The Story of Mel, the perspective of which I rather like.