Every player can only carry one Water of Life. Once you have a bottle in your possession, any other bottles you take will not count. Thus, allow another player to take the revive potion from the blue chest instead.
Pre-set food items slightly increase your character's stats when consumed at full (or nearly full) health, but only last until your character gets another food item or you finish the current stage (i.e. the food's stats bonus is only temporary).
Don't destroy all the pillars of bone in a stage as you can step on top of them to use them as ledges and reach higher places. You need a minimum of two or three skulls to reach high areas and most characters can clear four skull-high towers.
Alucard can hover in the air for a second or two more by assuming mist-form. While mist may not last as long as you need for some attacks on hard difficulty, you can use mist to stay in the air longer than a few other characters (without relying on a particular skill or weapon) by using mist-form correctly.
Unlike other weapons, Alucard's Heaven Sword can only do a magic strike (DOWN, TOWARDS, ATTACK) when a second Heaven Sword is equipped. The Heaven Sword is located inside the boss' gold chest in Chapter 3, Normal.
You can use your partner to reach high platforms. Simply perform a jump kick off of a partner's head while they are remaining still. You will get extra height from the bounce. Note: Charlotte cannot jump kick.
In single-player mode, the appearance of the clock hands will change depending on the system time. In multi-player mode, their appearance is dependent on the system time of the hosting player. The clock hands will be either solid or ghostly. Between the hours of two to four, and eight to ten, the clock hands will appear solid and can be used as ledges to reach other areas. Between the hours of ten to two and four to eight, the clock hands will appear ghostly.
When playing with others, any player that is killed and turned into skeletons are liabilities. If skeleton players die, multiple minutes are docked from EACH of their deaths.Also, if you are turned into a skeleton and no one revives you, don't hamper your team by dying. Instead, stay away from the boss and other sources of damage.