1. Explore the Castle: Move through the castle, defeating enemies, and collecting items. Make sure you explore every area, as there are many hidden rooms and items.
2. Defeat the bosses: There are several bosses in the castle. Each boss has its unique attack patterns, so you need to learn them and adjust your strategy accordingly. Dracula, the final, is the most challenging, so make sure you are well-prepared before taking him on.
3. Find and use the Relics: Throughout the castle, you can find powerful items known as relics. Relics grant you special abilities or powers that will help you in your journey.
4. Level Up: By defeating enemies, you can gain experience and level up your character. This will increase your stats and abilities.
5. Unlock the Inverted Castle: After defeating Richter Belmont, you can access the Inverted Castle. This is a mirror version of the regular castle and is significantly harder. You'll find extra challenges, enemies, and bosses.
6. Collect All Key Items: There are several key items hidden in the castle, such as the Holy Symbol, the Alucard Shield, and the Crissaegrim. These items are necessary to progress through the game.
7. Use Special Abilities: Alucard has access to various special abilities, such as the Bat form, Wolf form, and Mist form. Use these abilities strategically to navigate through the castle and defeat enemies.
8. Complete Side Quests: There are several side quests in the game that you can complete to gain rewards. These quests will also help you explore the entire castle.