Nitrome has released another new Test Subject seires, in previous Test Subject game, we've guided the little blue piece of protoplasm test subject through two incredibly enjoyable series of experiments. Now it and you faces your greatest opponent yet: a person next to you at the keyboard! Yes, it's Green vs. Blue in the multiplayer-only Test Subject Arena.
Test Subject Arena is a platform multiplayer hame released by niltrome on June 15th, 2011. It is Nitrome's first ever multiplayer game to not have a single player mode, deeming it a multiplayer only game. Nitrome has said that if the game is popular, they may make other only-multiplayer games. Because it is a spin-off, the game does not involve the story as seen by the previous games in the series.
Inside the gameplay, at the start of each stage, both players are spawned out of a spawn cylinder with a goo holder that is half full. Both players now have to work their way around the level and attempt to shoot the other player. When the opposing player is killed, whether by the other player or a hazard or an enemy, the opposite player receives some extra goo in their goo holder while the other player loses a portion of their goo. The game ends when one player has depleted the other's goo supply or if time runs out. If time runs out, the player with the most goo in their compartment is declared the winner.