"Strategema" is shareware.
This means, you can download the game from the internet, test it as long as you please and then decide, whether you want to buy it or not. So shareware games are still successful in the world wide web. If you are not a registrated customer without an activation code, you can only play 10 turns instead of up to 50 turns each game.

download English Version (1.7 MB):strategema.zip