Most molecules combine with other molecules and create different substances. But, in the game of Catalyst, your job is to keep the molecules from reaching center stage and creating something that might be devastating. Using the arrow keys to move your Catalyst around and use the space bar to shoot matching colored molecules. But, if the color is different, the molecules will change color so you have to stay ahead of the game in order to keep the molecules from reaching the middle. Good luck in this fast-paced game of skill and preparation. It's a never-ending battle so come prepared for a fight. Catalyst is one of our many Puzzle Games that we publish on TheGamerStop.com. This game is also tagged as a Matching game. Click the play button to start having fun. To play even more free games, view our popular and new games page. If you want to play more games like this, then you can simply check out the games inside the game tags that are the most relevant to your interests or the Puzzle Games category or the games like this game page at the end of the game tags.