Black Machines is a turn-based game, where you get a number of actions each turn. In Black Machines, you take control over computers and the more computers you have control over, the more actions you get per turn.

Your goal is to protect the special computer (the black thing in the bottom left) from the enemies. The enemies approach from the right at the end of each turn.

You can either take control over a new computer (for 21 actions), destroy a random enemy (for 2 actions), or destroy all enemies (for 45 actions). If you don't have actions to complete one of these procedures this turn, they'll be completed in the next turns. For example if you have 5 actions per turn and have 1 actions remaining this turn and try to destroy one random enemy (click the "Destroy one enemy (2)" button), it will use one action from the current turn, then that turn will end (because you now have no actions), and then it'll use 1 action from the next turn (so you'll end with 4 actions remaining).

One enemy alone is not able to destroy the special computer, however, two enemies are able. So if one enemy reaches the special computer, you need to destroy that enemy before another enemy reaches it.

You win by taking control over all the enemies, for 12345 actions.