mGalaxy uses a powerful "nested filters" engine!
That means that you may filter on many attributes in cascade.
Ex.: I want to filter out my list with my available roms only THEN filter out the result with my favorite games only THEN filter out the result on 3 players only...etc
The filtering may be done from 2 places: the "Preference" window and the "Search" window.From the "Preference" window, you may filter on: available only, favorites only, specific genre, players number
From the "Search" window, you input a term and the list will be filtered out on this term until you choose to "Clear" it
There are icons on the interface to help you figure out which filter is actually in actionNow when I start mgalaxy it shows only one game 'contra' and at the bottom left it says 'co' which must have been the search string? I can't figure out how to get to the menu where all the games are displayed
So now to reply to your question: your game list is filtered (or maybe multi-filtered).
You just need to remove the filtering by opening the preference/search window and clearing it!