Although Buckner and Garcia are the writers and original recording artists, they are not the only ones to record the song. Below is a list of other versions I am aware of. (Note that the Buckner & Garcia versions mentioned on the records page are not currently listed here.) I hope to provide a short clip of each in the future.
"Pac-Man Fever Unplugged" appeared (I believe) on Buckner & Garcia's follow-up album to the 1999 Pac-Man Fever CD, Now and Then. This version of the song features Gary Garcia accompanied by a couple guitars and without backup vocals or Pac-Man sound effects. The album was sold via the original MP3.com and is no longer available, although you can theoretically hear the song on Buckner & Garcia's web site.
Yes, Buckner & Garcia attempted to cash in on the Pokemon craze. They simply changed the lyrics of "Pac-Man Fever" to come up with this song, which was also on their Now and Then album. It went nowhere and now one can scarcely find any mentions of it on the Web.
This version of the song is covered by the Beachwood All-Stars. It appears on Linda Fratianne's workout album, Tune Up with the Hits, which was published by CBS Records in 1982. According to the cover, Fratianne was a silver medal winner at the 1980 Winter Olympics. The album includes a book of workout moves for each song. The song is not really suited for general listening, as it has voice overs from Fratianne prompting the various workout moves.
This cover of the songs by the Echoes appears on Hooked on Disco from Warner Brothers Records. Note that they misspell "Pac-Man," which is a common mistake. Oddly there is no copyright notice or date anywhere on the album, although there is an "all rights reserved" notice.
On The Glory of America from 1983 by Donny and Marie, the Osmond Brothers, and Jimmy, is this six-minute medley sung by Jimmy Osmond. About forty-five seconds of it is "Pac-Man Fever." This would later inspire another version by Derrick Bostrom (see below). This album was also released as a special limited edition under the name America Fest in 1984.
This cover appears on Songs of Spiritual Uplift as Sung by Today's Sounds. Today's Sounds is Derrick Bostrom, drummer for the Meat Puppets, and his friend Bruce Sandig. This cover was not inspired by the original Buckner & Garcia version, but by the bit used by Jimmy Osmond in a medley (see above). Bostrom says, "though it lasted for all of 45 seconds, it formed the basis for my arrangement. I still haven't heard the original, but the Jimmy Osmond version rocks my world."
Songs of Sprititual Uplift is actually a 7", four song record album released by the now defunct Amarillo Records in 1996. According to the official site, you can still purchase it for $4.
"Pac-Man Kuume" is the Finnish version, performed by Tuijamaria. This song was released on 45 in Finland. Ville Ranki brought this version to my attention and tells me the orange sticker in the picture says something like "sample record, not for sale." As you can see from the back, this single was sponsored by Atari, presumably to support the 2600 version of Pac-Man. "On Sydän Syrjällään" is the name of the B side song. In Ranki's words, "it's a love song title but I don't want to even try to translate it."
This is a German version of Pac-Man Fever performed by Gerald Mann. It appears to have only been released as a single, as shown in the discography on Mann's official site. ("Wie in alten Zeiten" appears on the cover and means "as in old times." I'm not sure, but I believe this is the title of the song on the record's B side.) I have yet to actually hear any of this version.
The name remained in English for the Philippine version of Pac-Man Fever, performed by the Green Notes. The B side is a song called "Lift Off." This is another version I have yet to actually hear. I'd guess that it was recorded in English, instead of Filipino, but it's only a guess.