Decathlon: also known as RSI Holocaust 
Oh maaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaan remember that 10km run? TERRIBLE! ^_^
RPG:
* SD-Snatcher
* Dragonslayer 6
* Randar 3
platform:
* Psycho World
* Uass
* Vampire killer
* Contra
* Frantic (didn't come very far, but in the end I had the impression that I played it a lot 
)
shooter:
* Aleste
* Aleste 2
* Topple Zip (my first game yay!)
* Nemesis 3
Puzzle:
- PeachUp number.. uhm.. dunno, the version in which you had to kill 3 kinda enemies with 3 kinda weapons.. great game!
old:
a number of old superclassy games that were in the 30 hits collection.. like:
* Boulderdash 1&2
* Scooter
* Break-in
* Hardboiled
(still looking for 3 DSK images of these disks, since my own are nearly unreadable now)
Speaking of those old games, did any1 ever play/finish those old games like 'Happy Fred' ?
Argon's remark is an interesting one.. it once more makes clear that a copied game isn't the same as a sale-loss.
Hell
I had a VG-8020 in those days, so I really couldn't use copied games 
No, there are ofcourse also copies that one could have easily bought.. let's call them 'lazy copies'. But take the msx 80's.. Konami games are hyped, and everyone must play them. These carts were 60..80 guilders each.. how can you expect an 8..10yr old kid to get all these carts when the kid has 1,- pocketmoney each week, the usual combined 20,- for the 2-yearly school-papers, the usual b-day 30, and the anual sinterklaas/xmas cash? If the kid didn't spend it on a few small thingies, he could buy 1, maybe 2 carts each year..
This doesn't make copying legal ofcourse, but if you have these kids as your target-public (and imo young kids were the target public for the early Konami carts), you can't expect them to buy your whole collection, can't you? And I wonder if all parents are prepared to donate these games on a regular base (even if they can!).. perhaps they simply say: 'hey, you already have that MCM subscription, rather type those game-listings.. have fun with HAL and Pucky'