I could have finished more games but as I was almost always with friends in arcade places, most of the times we lost lives just because we were speaking/joking
* 
Arcade halls were good extra socialisation places
.
So, did finish :
- Out Run (all races)
(so 1 credit each race 
)
- Hang On
- Dragon's Lair
- Wonderboy
- Shinobi
And failed close/not far from end :
- Wonderboy in Monsterland
- Gradius
- Parodius
- R-Type
- Robocop
- Strider
- Altered Beast
- Golden Axe
- Rygar
- Ghost'n Goblins
- Jackal
- Karate Champ (like "Frank Dux" & "Ray Jackson"
[ Show youtube player ] )
I don't remember if this game has really an end...
*Edit: I must say that sometimes we were speaking on purpose
. Ahhh, what a good time
!