Operation Wolf - Master System
Wow! Got to be one of the best Master System arcade conversions out there, particularly from a third party. The presentation is spot on, the enemy variety is good, and the levels resemble to arcade to a Tee. Actually quite good to play with a controller too (as long as you don't use the original Master System Controllers that is). (Note: I mention in the video how its sad that there is no music in the levels but insanely enough, even the arcade version doesn't have any there either so the port is faithful :)