Castlevania: Portrait of Ruin is the sequel to the Castlevania: Bloodlines game which was released in 1994. Portait of the Ruin was developed and published by Konami for the Nintendo DS in 2006.
It's set in Europe during World War II where the conflict between the Belmont vampire hunters clan and Dracula have escalated; the humans have tracked Dracula to his castle where they attempt to kill him. The main protagonists are Jonathan Morris and Charlotte Aulin, two hunters from the Belmon clan and the game follows them as they fight through the castle in an attempt to reach Dracula.
There are two endings for players to find depending on how they act during the game however, only one ending will reward the player with the final credits.
It's a 2D side-scrolling game where the player can control either of the protagonist at any point in the game; gameplay emphasis is placed on platforming, combat and adventure. There are over 150 different types of enemies which are spread across the games different locations, details on each of them are available in the Bestiary.
The two playable characters can use their combined power to perform a powerful attack called the “Dual Crush”; certain points of the game requires them to combine their attacks to progress through levels. Some levels in the game use puzzles which can be completed by using the Dual Crush ability. Each character has a range of weapons that can be used and collected as the game progresses.
There are four different single player modes for the main story including a “Sisters Mode” and also a “Boss Rush Mode” which have alternative playstyles to the main story. In the Sisters Mode, the player controls Loretta and Stella Lecarde in a new story which acts as the prologue to the main story. The “Boss Rush” is a time attack style mode where the player must complete the levels as quicjly as possible. The other modes in the game are “Richter Mode” and “Old Axe Armor Mode”.
 What's New
This is the first game in the series to feature a co-op multiplayer mode; players are able to complete the Boss Rush mode together using the online co-op feature and once this mode has been completed once, more is unlocked to the player. The online Shop allows players to sell items to other players in exchange for currency.
Four single player modes – Fight through the different single player modes and advance through the story
Two endings – Complete the main story to get one of two endings
Dual Crush – Perform a special attack using both main characters
Co-op multiplayer – Work with a second player to defeat the Boss Rush mode
 Players liked:
- Large amount of weapons to collect
- Interesting new team mechanics
- Excellent music
- Great boss battles
 Players didn't like:
- Very limited co-op
- Dull level design
This game is also known as Akumajou Dracula: Gallery of Labyrinth in Japan.