Mine is Alien Syndrome by Sega.
I initially got it for 20 bucks, needed a new monitor and a power supply, I initially was going to turn it into something else, as when I played it on Mame, it wasn't really fun.
However, after people on this forum said it was a cool cabinet and that I should try to restore it since it was the official Sega version. Well I got the PCB finally working, installed a new ISO, power supply and monitor. Bought the Alien Eye's topper that mounts up top, and out of all my cabs, it gets the most compliments. However, i'm about the only one that plays it, as if you use the default setting, it is a pretty hard game. 3 guys, 7 levels. No continues and no way to earn more guys....
Again, I hated it at first, but after I got it all up and running, it's been one of the games I play the most. And I like it more and more...lol...even though it's hard.
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