Fury Unleashed

In Legendary game mode you cannot upgrade your character; you will have to go through the whole game (from the start to the last boss) on level 1.
This means you will have to rely heavily on guns, armors and blessings to be powerful enough to survive.

Luck - as in any roguelike game - is a factor; but having tried this at least twenty times before finally achieving it, I can say that the game pretty much always gives you the tools to make it.

Some tips to follow:

- In the beginning, don't worry too much about keeping the combo up (you lose it too easily, and you only have one shield anyway); explore the first two worlds and gather as much gold as you can (you'll need it for blessings, weapons and armors).

- Reload speed is key, so get that +10% / +28% / +25% bracelet as soon as you get the chance (no damage protection here, but it is really worth it). You can get a reload speed bonus also by investing in blessings.

- There's a couple of very useful helmets: the combo duration one and the potion drop one.

- You can find the Fast Travel upgrade, the Map Reveal and the +3 Grenades upgrade in chests, and of course they are all very important (so prioritize them even on good weapons / armors).

- Accept challenges and enter portals with combo 5; if you fail, there's no penalty. I always choose gold as a reward, to be able to invest it in blessings (250) and armors / weapons (when in need).

- Now, the Devil: I personally chose to get the gold +34% upgrade at the cost of 20% health. And of course, if you're not low on health, consider "buying" things for blood (you can always regain your health).

Good luck!