Kena: Bridge of Spirits

There are 18 upgrades total that you'll need to purchase for this trophy: 5 Staff, 5 Shield, 5 Bow, and 3 Bomb. These are all purchased with Karma, which you'll get from defeating bosses, cleansing shrines, clearing corruption, etc. You should get plenty on the lower difficulties, but it did feel like the Karma reward was a little less than stellar on Master, but... as long as you're going for all of the collectibles in the game, you should get more than enough Karma to purchase everything. You really want to get these as you go, especially the Rot-upgrades as those do a pretty hefty amount of damage that can really save you in dire situations (especially the Rot Hammer!). If you don't get all of these by the time you finish the game, there is freeplay after the final boss so you can still collect Karma and purchase the last of the upgrades you need. Once you've purchsed everything, the trophy will unlock.