The Soviet Block is a single player, freeware, Tetris clone.

While gameplay is virtually identical to other games of this genre this implementation does have some game configuration features worthy of note:

* The player can start at any level, there are ten in all

* The game speed can be adjusted to cater for processors ranging from 4.77 to 33 MHz

* The 'Next' or 'Look Ahead' feature that shows the next shape is optional.

* There are two sets of shapes, Standard and Extended

* The action keys can be redefined

* The falling pieces can be set to rotate either clockwise or counter clockwise

The game has a 'Boss key', high score table and optional sound effects.