1) Install your base game. It should install to C:Matrix Games/Achtung Panzer Operation Star by default. If not change it to there as you do not want to install to Program Files. Leave all items checked through install process.
2) Run game. Version should be 5.77 (1575) on upper right of main menu screen. Exit the game.
3) Download the Core Update file named gtos_cu_581c1_eng <----- Link
4) Download the newest patch named gtos_patch_aug13_rc2_eng.gt2extension <----- Link
5) Run the Core Update file (gtos_cu_581c1_eng.exe) and install it to where you installed the game i.e. in the C: Matrix Games/ Operation Star folder. Do not install to the default Program Files. Leave all boxes checked. The Game Updater screen will open.
6) In the Game Updater screen click the Install button. Browse to find your patch file gtos_patch_aug13_rc2_eng.gt2extension and click it. You should now see in the Game Updater screen that your game is now updated to version 4.09.
7) Click Save and Play. It will be Version: 5.81 (2170) Update: aug.13 in the main menu.
If you want the Polygon Update you'll need apos_upd_tar_rak_mar13_eng.gt2extension <----- Link. Follow #6 & 7 above to install Poly Update. Note: you must use a download manager to get this file for some reason. It is 1234 mb. In the Game Updater it is called District Update 1.03 and should be at the bottom of the list.
Installing DLC's
1) Run the DLC executable which will unpack the Core files of that DLC. (its best to create an appropriately named folder and unzip it there)
2) Open the Game Updater (this can be done by either clicking the version number in the games Main Menu screen or by clicking the update.cmd file in your game install folder)
3) Click the Install button and change the default Addons (packed)*g2extension filter on the bottom right of the screen to All Files*.*.
4) Point to where you have previously unpacked your DLC, open its Core folder and click on the desc.addpack file. Game will update and the DLC will be shown in the Game Updater screen. (All DLC's will be of this desc.addpack type except for the newest Shilovo42. It will be in the .gt2extension format.)
5) Click Save and Play
*Note*
The DLC's need to be arranged by moving them Up or Down to be below the Game Update in priority.

mo reb