Complex sentence: More than half of the games, both Mother Ship and Escort titles, have their own "Characteristic Genre", a short "Genre" that in addition to labeling them as RPGs, illustrates a particular storyline theme or noteworthy aspect of that game.
Split into simpler sentences: More than half of the games, both Mothership and Escort Titles, have their own "Characteristic Genre". A short "Genre" label that in addition to labeling them as RPGs, illustrates a particular storyline theme or noteworthy aspect of that game.