Dont want to Damage your original copy and keep it in mint condition. This is your alternative..
This is one of the more expensive games for the Sega CD.
 
Earthworm Jim: Special Edition (Sega CD) Details
 
This special edition includes the most requested features from the EWJ fan club. So if you were a little intrigued by the original title, wait till you see it on CD! A password system - so you can start where you left off. New world and new hidden areas - Big Bruty is a totally hilarious new world, full of new adventures. A new weapon - Earthworm Jim gets an incredible new weapon to take on his vile enemies. Over 1,000 additional frames of animation. All-new CD-quality soundtrack and sound. Totally new endings in two of the worlds, and a new introduction!
 
Full Price Guide: Earthworm Jim: Special Edition (Sega CD)
Loose
$165.30
Item & Box
$221.30
Item & Manual
$283.00
Complete
$349.99
New
$630.00
Graded CIB
-
Graded New
$800.00
Box Only
$56.00
Manual Only
$118.13
 
Ebay link.
 
https://www.ebay.com/itm/127337773868?_skw=earthworm+jim+sega+cd&epid=56243133&itmmeta=01K856741CEGX41MEB84KBK1MA&hash=item1da5ec3b2c:g:5nQAAeSwsZtosLvt&itmprp=enc%3AAQAKAAAA0FkggFvd1GGDu0w3yXCmi1fLvONg5SNX1Qedsn5bS0B2VbP7K3NW7uRY8yJmbVDvVCmUHJctcCxY5MBSXiQQ11FzGCsr3MovGglYBFPRJZmY0NI%2B6zLquy3sSeq0mUSvv49fo44ekhIyCIWDZGow%2FnPa14QTI2zk3jRWeG3rgCngS%2BWtJckK1jxeuohx2kB%2B7msv5h1h0IKNDFfuzAuq7UOfePQLDiE5dtCjGf0mTxtEAa0tNvsMmojenA3aJAyOYkMIFD%2F5mlROuvs2R0IwLLw%3D%7Ctkp%3ABk9SR-jAnKbBZg