Risk of Rain 2

One of the best games that I started playing is Risk of Rain 2, a 3d roguelike shooter where you collect items and defeat bosses to progress through stages. I think the best part about this game is that they do not cap how strong you can get. You could get as many of 1 item as you want, or be diverse and go for all of them. Theres plenty of characters with different item synergies, along with abilities and difficulties. And the game isn't easy, either. The enemies/monsters scale with your power, making them much more difficult every stage. You can also loop back to the first stage, and restart from stage 1 with all your items, against new and stronger enemies.