You may tag your Games as being in as many Game Systems as you want. The first 3 game systems that you list, will be used for your game's appearance in the LFG system. Since you have 3 game tags that you like, that's a good fit. You can tag all 3, Dungeon World, Apocalypse World, and Other. Here is the Wiki Documentation about the LFG listings, <a href="https://wiki.roll20.net/Looking_for_Group#Create_L" rel="nofollow">https://wiki.roll20.net/Looking_for_Group#Create_L</a>... Since the guideline about being able to list 3 games under Playing: is not described on that Wiki page yet, I will work on adding this information there.