Can you name the rest of the chain? Test your knowledge on this entertainment quiz to see how you do and compare your score to others. Quiz by donnieT. The objective of the game is to invoke a chain reaction for as long as possible. Molecules will activate each other if their side atoms are connected. The more. Chainreaction, Clear the grid by crossing off the coloured symbols one by one! the current one either in shape or colour. Use the mouse to play this game.