Castlevania: Lords of Shadow - Mirror of Fate HD

You'll have to fight the game's 10 bosses in a row with no health or magic recharges inbetween. It will be important to conserve magic while you fight. Difficulty doesn’t matter, so do this on easy. You keep any upgrades you've found in the main game for this mode, so you shouldn’t attempt this until after you’ve reached the max level and gotten 100% completion for each character. See each boss trophy for tips on defeating the bosses.

Some general tips for boss rush mode:

1. Some bosses summon minions. Defeat them without any magic activated for a small amount of Mana.
2. Sub-weapons are mostly useless. The exception is Alucard's hourglass, which slows time. Use these religiously.
3. I found the combo from holding very useful against all of the bosses.
4. Magic: Simon should keep his shield up most of the time. You'll never need his attack magic. Alucard's Mist form can absorb health from the Reaver and Dracula, but it takes up way too much magic to be worth it. Alucard's Wolf form should only be used to destroy the generators when facing the demon lord, as long as your health bar isn't full, Trevor's light magic should be on. Don't use his dark magic until you're forced to in the final battle.