Mad Mix Game(s) aka The Pepsi Challenge (DOS/Amstrad CPC/ZX Spectrum/C64, 1988)

You can run it in your browser here.

If in-browser emulation isn't working again yet, you can play the Spectrum version in your browser here instead by clicking JSSpeccy or QAOP here, or download the DOS version as a .zip file here and run it this alternate in-browser emulator.

Tips for that alternate DOS emulator: for this game, click 'fixed' under 'cycles' and change it to 500 (you can click Back during the game and adjust this if you want), then replace the line under AUTOEXEC with these two lines with nothing in between (click the line to start editing; press enter to add second line):

CD MADMIX

MADMIX

Another tip: if the alternate emulator's page is blank, refresh it properly with Ctrl-F5.

Pac-Maine (DOS, Raymond T. Albert, 1988)

You can play it in your browser here.

Pac-Kombat (DOS, StupidSoft, 1996)

You can play it in your browser here, and you can read about it here - includes a link to the readme with all the special moves.

Mastering Pac-Man - Revised Edition (Book, Ken Uston, 1982)

This sort of thing is why Pac-Man Fever mentions patterns. Also covers Ms. Pac-Man, two far more obscure clones, and Atari's notorious BANKBANKBANKBANK version. You can read it here.

Video Games: A Public Perspective (Video, 1982)

A pro-video-games VHS tape funded by Atari. You can watch it here.

Crazy Chicky (VTech Creativision, 1982)

Modified version of 1981's Crazy Pucker/Chewy/Moonie. You can play it in your browser here. You can read the manual here.

Controls: F10 at start, Control or Shift to select mode, Z or any of several other keys to start playing, arrows to move.

Maniac (Classic Mac, Alex Metcalf, 1992-1994)

The Pac-Man variant where eating dots doesn't beat the level - it charges up a Gradius/Parodius-esque power-up you can activate at any time. To actually progress, touch the rainbow thingy... and suddenly play Hangman? You can play it in your browser here. The then-mindblowing MOD music tracks won't play all their instruments on this emulated system (or Infinite mac's system7.app's current one), so you can listen to them all as they were meant to be heard here.

Controls: arrows, Space, and keyboard letters.

Ms. Pac-Man's Prize Pupil (Book, John Albano, 1983)

You can borrow it digitally here.