No, you don't have to download just about anything. All games in our database are browser-based and don't need any download or set up. That said, some older games require Flash player, so You could have to install it if you wish to play some of these games and do https://info.undp.org/docs/dao/UNSP2015/Lists/PostSurvey/Item/displayifs.aspx?List=6e146e50-e299-46da-a20e-b9e885dace29&ID=69315