Space Invaders Anniversary – This is a whole collection of legendary games devoted to battles with alien creatures, which was released on the 25th anniversary of the existence of the project. All the main goal includes in the collection of the game: it is necessary to make the maximum efforts to destroy aliens. It is proposed to fight them by using a laser gun. Opponents are moving in agreement and organized. They come in five slender rows, each of which contain 11 fighters. They can move in horizontal and vertical directions. It is important to remember that after each well -aimed shot, the speed of movement of enemy fighters increases, which makes the game process exciting and dynamic.

Space Invaders Anniversary includes:

• Monochrome version. This is the very original that came out in 1978 for slot machines.
• Color version. Modification of the original development, the picture of which was made in several colors.
• Cellophane version. A distinctive feature is the presence of five layers of color transparent film, which are placed on the screen and are designed to mask several black zones.
• Vertical version. Similar to the previous option and is supplemented by another background.
• Part II. It complicates the task facing the user, the presence of two varieties of aliens ships that can replenish the ranks of units with new characters. If the first is constantly in the visibility field, then the second flickers. In addition, sometimes, after hits from the gun, opponents do not die, but bifurcated.
• 3D. In addition to the updated graphics, it is distinguished by the appearance of enemy fighters of an attack capable of killing the main character the first time.