The slogan may be "Every game. Chronologically" but the philosophy is really "Every game I can find and afford, or, if not, emulate. Chronologically."
There have been a few games that I to plan to get even if they didn't make it into my first six years of chronogaming.
Atari PONG - The first killer ap for home videogames.
Odyssey 300 - Because it was my first.
Coleco Telstar Arcade - I'm honestly not dying to play it, but I can't forget about it, either.
Coleco Combat - Ditto for this.
Atari Stunt Cycle - Ditto.
Atari Video Pinball - See above.
APF MP1000 carts with the following on them (some are on same cart)
UFO - Ooo! Another attempt at sci-fi! Possible imaginative game on MP1000 or not?
Sea Monster - It might not suck.
Dungeon Hunt - Earliest Fantasy based home game?
Backgammon - I'm wondering if they had opponent AI.
Boxing - Curious about this, too. Would've been first Boxing title.
Roulette - Haven't seen a Roulette game since the 1972 Odyssey.
Keno - what the hell is Keno anyway?
Slots - First example of Slots on a home system.
If there's anything that I haven't listed, I must've forgotten it already!
I'll simply live without the experience and move on with my life, namely, 1979.
Of course, there's a danger here in not being completely obsessive compulsive about it. By nature, I'm pretty lax, so it's easy to say, "well, I won't worry about playing such and such" every now and then. I mean, I HAVE a life, surely I can forgive myself for not playing EVERYthing! However, I must be careful about saying it too often, because I'm certain I'll end up missing something that I would have thought was worth playing. Either that or I'll wake up in the middle of the night 20 years from now and say "Slots!!! I never played APF Slots!!!" So, I'll try to be lax, but um, vigilant at the same time, if that's even possible.
I'll list the games for 1979 next entry.