Spanish Mission - Courtyard: Elixir
When inside the villa, climb up the haystacks to reach the top level. Then, break the wooden boards that are blocking the window near to where the key was located.

Sunnydale Cemetery - Entrance : Power Crystals
Face the cemetery gate and search for a gravestone to the right. Break it to reveal a Power Crystal.
Drop down the hole created when the giant vampire appears to find a second Power Crystal.

Sunnydale Cemetery - Entrance: Elixir
Get to the second courtyard and open the orange crypt door at the top of the stairs to find an Elixir.

Sunnydale Cemetery - Graveyard: Health Crystal
Get towards the end of the level, where zombies spawn from tombs to attack you. A Health Crystal is hidden inside one of the tombs which are spawning the zombies.

Sunnydale Cemetery - Graveyard: Power Crystals
Enter the main gait then immediately turn left. Break the wall behind two candles to find a Power Crystal.
Find the coffin the spawns the zombies. Search the small building to the right of the coffin to find another Power Crystal.

Sunnydale High School - Boiler Room: Elixirs
Open the rusty door on the right side in the first room to find a hidden Elixir.
After the explosion, go back to the main staircase. Walk downstairs to the boiler room entrance. Open the janitor's door and move carefully behind the flames to find another Elixir.

Sunnydale High School - Gymnasium: Elixir
Get to the corridor where the first demon dog appears. Walk up the stairs and enter the room next to the room where Willow was hiding in the previous level. Look bbehind the broken desk near the chalkboard to find an Elixir.

Sunnydale High School - Gymnasium: Holy Water
After the intermission sequence with the man getting thrown through the doors, run through the now smashed open doors. Look for a brown locker in the hall. Open it to find a Holy Water.

Sunnydale High School - Library: Holy Water
After killing the vampire that throws fire, enter the classroom. Look inside the small white wall compartment that is slightly open at the back of the room to find a Holy Water.

The Bronze Nightclub - Back Alley: Health Crystal
Enter the doorway smashed through by the demon dog. Break the planks over the doorway inside. A Health Crystal can be found on the floor, near a corpse.

The Bronze Nightclub - Back Alley: Power Crystal
Leave the room after the intermission sequence with Scylla. Jump on the barrel and climb to the platform above the entrance. Look behind the boxes to find a Power Crystal.

The Bronze Nightclub - Exterior: Elixirs
Get all the way across the balcony in the spacious area where Spike is located. Jump down through the rooftop window to find an Elixir. Then open the big cupboard in this room to find a second Elixir.

The Bronze Nightclub - Exterior: Power Crystal
Get to the glass roof, but do not drop through it. Use the pole to shimmy across to reach a hidden Power Crystal.

The Bronze Nightclub - Railroad: Elixir
Use the cable to shimmy across from one rooftop to another. Break the four boxes behind a small wall to find an Elixir.

The Bronze Nightclub - Railroad: Power Crystal
Search the left side of the far end of the railroad tracks to find a Power Crystal.

The Bronze Nightclub: Health Crystals
Run upstairs past the giant vampire to the top level of the club. A Health Crystal is hidden under one of the wooden stools.
Go past the room where a victim flies through a window. Jump across the balcony to find another Health Crystal.