This guy: http://www.neocomputer.org/projects/et/
ROM hacked the original ET game for the 2600, to fix most of the bugs, flaws, and idiosyncracies. His write up of the entire process is quite in depth, and I found it an interesting read.
ROM hacked the original ET game for the 2600, to fix most of the bugs, flaws, and idiosyncracies. His write up of the entire process is quite in depth, and I found it an interesting read.