Test Subject series

The 'Test Subject Blue series consists of two games. Blue is the hero is both games, and undergoes tests. Each game is a puzzle platformer.

Test Subject Blue

 * Main Article: Test Subject Blue

Test Subject Blue was released on March 2nd 2011. In Test Subject Blue, the Professor is testing a Blue Enzyme he created against his previously created Enzyme Orange Enzymes. In each level, the player controls Blue and has to navigate him to the Key Card, then to the Food Pill.

Test Subject Green

 * Main Article: Test Subject Green

Test Subject Green is the direct sequel to Test Subject Blue. It was released on May 10th 2011. In the game, the Professor is killed while testing Blue against his newly created Green Enzymes. THe person responsible for the murder is Doctor Nastidous, who loots Xeno Industries and destroys it, taking all the Professor's equipment as well. Like the first game, the levels are the same. New interactive objects, enemies and hazards are introduced.

Test Subject Green Sequel
Although unconfirmed by Nitrome or anyone affiliated with Nitrome, it is believed by fans that Nitrome may make a Test Subject Green sequel, as the ending ended with "To be continued". It is yet to be confirmed what the name of the sequel is, if Nitrome plans on making a sequel, or if there even is a sequel in production.