Tetro Virus is a free, Android-based puzzle game that offers a challenging yet entertaining experience for all ages. The objective of the game is to eliminate viruses and cure the infection.

The game consists of capsules that fall from the top, which the player must manipulate by moving them left or right and turning them to align with the viruses and other capsules. Whenever four or more capsules or viruses of the same color align in a horizontal or vertical configuration, they are removed from the game.

The game's difficulty increases with each level, and the players can earn additional points by removing multiple horizontal or vertical chains of viruses and capsules simultaneously. If the players can initiate a chain reaction by removing one combination, it will cause the removal of another combination.

The game is controlled by four buttons that allow the players to move left, right, and down and rotate the capsules.

Overall, Tetro Virus is an addictive puzzle game that is easy to understand but difficult to master. Download and play for free to cure the infection and save the day!