No, it's not necessary to download everything. All games within our database are browser-primarily based and don't involve any download or set up. That said, some more mature games need Flash player, so You could have to setup it if you'd like to play A few of these games and https://www.myctb.org/wst/kck-yvp2/Lists/Join%20the%20Network/DispForm.aspx?ID=279423