This program is an extension of the Game of Life that transforms the classical Life from an environment for various experiments into a genuine game with an active player and a clear goal: rival colonies of virtual germs wage a war against each other, and you takes part in this battle in real time as a commander of your own living army; the playing space can be changed by inserting various auxiliary objects (sources of life, stones, food and poison). The colonies' behavior is highly amusing and unpredictable. Your goal is to capture control over all this chaos (there is a wide choice of goals: destroying one colony by adding cells to another colony; struggle for life, space or food; suppressing aggressiveness of the enemy life sources ; and many others). Flexible settings can be adapted for any selected goal: the program keeps detailed statistics and uses it to calculate a score according to adjustable score rules; the colonies growth can be automatically ceased by an autostop condition defined by the user; player capabilities can be regulated by restrictions of input. In addition, the program gives power to change rules of birth and death that is greater than in other implementations of Conway's Life. Thus, CellFighter allows you to construct and play many various games: each game can have its own goals (score rules), condition of end (autostop condition), behavior of artificial life (rules of birth and death), player capabilities (restrictions of input) and game environment (extra types of cells). It is an entire factory of games based on wars between chaotic swarms of tiny fighters! But this is not all - the features list can be continued: adjustable colors and forms of cells; import of patterns written in the most popular formats of Life files ("picture" and "point list"); copying the playing field to memory and restoring it from memory with one press of the button; adjustable speed of evolution.