Warframe is badass game for being free. Just need to grind. It's very easy getting in a clan and playing with people to grind it out. You don't need to buy a single thing in warframe but they do give you 200 Plat for signing up and you can use that for weapon slots and warframe slots .. Although I have 400+ hours into destiny and 40 or so in warframe.. I feel there neck and neck. If it was guardians vs tenno.. then definetly tenno takes the victory