While Castlevania III doesn't have a vast array of hidden collectibles, there are crucial items and upgrades that can significantly impact your playthrough. These are often found by destroying specific candles or blocks in the environment.
- Whip Upgrades: Trevor's whip can be upgraded twice. The first upgrade extends its reach, and the second allows you to hold the B button for a continuous extended whip. These are usually found in candles in later stages or dropped by specific enemies. Always prioritize getting these, as they make Trevor much more effective.
- Sub-Weapon Power-ups: Some candles will drop a double or triple shot icon for your sub-weapon, allowing you to throw multiple projectiles at once. These are temporary but incredibly powerful, especially for boss fights.
- Large Hearts: These replenish a significant portion of your heart count, crucial for sub-weapon heavy strategies.
- Money Bags: While money doesn't have a direct use in Castlevania III (there's no shop), collecting them contributes to your score, which can be a fun challenge for high-score chasers.
- Hidden Passages: Some walls can be broken to reveal hidden passages or item rooms. These are rare but can sometimes lead to extra lives or valuable sub-weapons. Look for suspicious-looking blocks or areas that seem too empty.
Thorough exploration and whipping every candle are good habits to develop in Castlevania III to ensure you don't miss out on vital resources.