The Artic system is a Galaxian class baseboard with plug in EPROM cards to change games. I've got a few cards for it, plus one I modifed with a 27C010 EPROM containing a few different versions of Galaxian, Midway/Namco/Super/Pt X etc. The character EPROMS are fixed at the moment, eventually I'll make those switchable too, so I'll be able to play any Galaxian class game.
Closeup of my hack. Normally up to eight 2716's populate the card. The two 2716's at the top are the character EPROMS. The DIP switches select the high-order address lines of the 27C010 to change games.