This is page 4. See also page 1, page 2, page 3, page 5 and page 6.
Orcus (Shop Tune)
1990 Vibrants
There are more tunes for Orcus on the previous page.
Orcus (Cop Ditty)
1990 Vibrants
Orcus (Bonus Track)
1990 Vibrants
Orcus “Slimy One” (Level Tune)
1990 Vibrants
Orcus “Slimy One” (Boss Tune)
1990 Vibrants
Orcus “Giv’ It Up” (Level Tune)
1990 Vibrants
Listen closely for a ring modulation effect almost saying “give it up” – first time at 0:16.
Orcus “Giv’ It Up” (Boss Tune)
1990 Vibrants
Orcus “Ouw Alien” (Level Tune)
1990 Vibrants
Orcus “Ouw Alien” (Boss Tune)
1990 Vibrants
Orcus “Guitaring” (Level Tune)
1990 Vibrants
Orcus “Guitaring” (Boss Tune)
1990 Vibrants
The bassline was something my brother and I used to prank around with when we were kids.
Orcus “Scary End” (Level Tune)
1990 Vibrants
Orcus “Scary End” (Boss Tune)
1990 Vibrants
Orcus “Klingonzo” (Level Tune)
1990 Vibrants
Orcus “Klingonzo” (Boss Tune)
1990 Vibrants
Orcus “Dark Lord” (Level Tune)
1990 Vibrants
The only tune I ever did in 3/4 time on the C64.
Orcus “Dark Lord” (Boss Tune)
1990 Vibrants
Orcus “Funk Level” (Level Tune)
1990 Vibrants
A funky piece that uses four-fingered chords.
Orcus “Funk Level” (Boss Tune)
1990 Vibrants
Orcus “Atmosphere” (Level Tune)
1990 Vibrants
Orcus “Atmosphere” (Boss Tune)
1990 Vibrants
Orcus “Back Home” (Level Tune)
1990 Vibrants
Uses a double-voice drum.
Orcus “Back Home” (Boss Tune)
1990 Vibrants
Uses a double-voice drum.
Orcus “Orcushion” (Level Tune)
1990 Vibrants
Orcus “Orcushion” (Boss Tune)
1990 Vibrants
Pheric
1989 Vibrants
This uses filtering in two voices.
Pit-Fighter (Ingame)
1991 Domark
A level tune that only use two voices.
Pit Pot
1988 Jens-Christian Huus
Conversion of a tune from the Sega Master System game Pit Pot.
Police
1989-90 Vibrants
Composed in a very fast speed setting.
Popcorn Remix 
1989 Vibrants
Remix of “Popcorn” by Gershon Kingsley. There are interesting changes at 1:32 and a solo at 2:44.
The Puma
1990 Vibrants
Push-It (Intro)
1989 Vibrants
Made for a puzzle game called Push-It, but it was never finished. This intro tune features a double-voice drum and has interesting changes at 0:17, 3:09 (solo) and 3:56.
Push-It (Title)
1989 Vibrants
Push-It (Ingame)
1989 Vibrants
Push-It (Hiscore)
1989 Vibrants
Greets from a former Toronto Canada C64 user! Wow — a lot of memorable tunes in this list! I use to rip the music from various intros and demos so I could play it back at my leisure.
What are the licensing and attribution requires for the music you authored? I am putting together some DIY/electronics-modification videos for YouTube, and would like to use one or more of these tunes as background music.
Thanks, and greetings to you too.
Remember to check out my online player DeepSID too. There’s a link in the side bar.
Regarding the licensing and attribution, I reckon it’s the same as stated by HVSC. See the bottom of this FAQ page about releasing a cover of a SID tune commercially.