RARE VIC-20 Cartridge - have you ever seen this?

[English Invader]

OK so I plugged it in ... and .... NOTHING - just your 3583 bytes free!

So .... either it's damaged or it's going to require a SYS to get it running.

I do have a HES multi cart unit, any suggestions on how to dump the memory?

It might just be a question of cleaning the cartridge. A cotton wool bud and a bit of isopropyl alcohol along the bottom should do the trick.