De Blob

[edit] Gameplay
The player starts out as a ball of clear water. They then roll the character around until it runs into one of many paint cans which consist of three basic colors; red, blue and yellow. de Blob then rolls and jumps around splashing and sliding on the city's buildings, smearing his newfound hue, returning their color. As he does this the once-silent city gradually regains its soundtrack with each "stroke" of de Blob, with each color corresponding to a particular sound. de Blob can mix the three basic colors to obtain one of four aditional colors. If the player wants to rid themselves of their color, they can go to a pool or a hydrant. As de blob collects colors, his capacity rises to a threshold of 100, growing bigger in the process.

de Blob wanders the city spreading color and life at the request of a surviving Raydian.
The more paint added to the city, the more citizens, known as Raydians, will arrive with various missions for de Blob, including obliterating groups of INKT patrollers, painting entire landmarks, or even painting various locations by hopping from target from target without touching any other surfaces. Eventually there are vast pools of "ink" splattered by the evil corporation and cause de Blob to turn black and lose life until he washes it out with water. The enemies have not been officially named yet and are only known as the INKT oppressors. They come in various categories such as the ground class, which walk, the air class, which can fly when they turn their hat into a personalised zeppelin, and the water class that fires ink from the seas via old-style steamboat.
As de Blob paints the city and complete missions, points are accumulated. Each gate separating the player from the next part of a stage can be opened by reaching a certain number of points.

[edit] Plot
de Blob is an action puzzle title that allows players to explore and liberate an alien city from the evil, monochromatic I.N.K.T. Corporation that has taken over the city and outlawed all color and fun from daily life. Playing as de Blob, gamers will embark on a quest to re-animate the city of Chroma, and bring spunk and character back to the oppressed, by splattering buildings, landmarks, and citizens with color. de Blob features an intricate single player campaign as well as a multiplayer experience that supports up to four competitors via split screen.

[edit] Development
de Blob was originally developed as a free downloadable game for the Windows PC by eight students studying Game Design & Development at the Utrecht School of the Arts and one student studying Game and Media Technology at Utrecht University in the Netherlands. At the time of conception, sections of Utrecht were being rebuilt and the principal task in creating the game was to convey how the railroad station area of Utrecht would look in 10 years. The city of Utrecht has adopted the de Blob character as its mascot.[4] THQ noticed the game and was very impressed with the team's work, and acquired the rights to the game. THQ handed over the game to Blue Tongue Entertainment and Helixe and the companies each developed their own versions for different consoles.[7][8]

information from wikipedia