Welcome to John Tiller Software

John Tiller Software has been developing quality computer wargames for both commercial and military customers since 1995. In that time, John Tiller Software has developed over 80 commercial wargames and successfully performed over 20 research and development contracts for the Air Force and Navy. Wargames developed by John Tiller Software have received many awards including Wargame of the Year from industry media on multiple occasions. In military education, over 21,000 officers of the United States Air Force have used John Tiller Software's Modern Air Power in the Air University at Maxwell Air Force Base. Wargames developed by John Tiller Software are known for both their user-friendliness and accuracy. They cover the range of military conflict from the time of the musket and pike to present day and the future.


Air Force Funding for Advanced Wargaming!

The Air Force Research Lab has approved funding to John Tiller Software to provide advanced space and cyber wargaming capabilities in support of research into future Science and Technology.


Civil War Battles Updates

A new round of updates are being released bringing the series up to the Petersburg level with engine changes and graphical enhancements. Each title will also be getting its own 3D Map package. To get the updates for Antietam, Chancellorsville, Peninsula & Petersburg visit the Updates page.


Republican Bayonets on the Rhine released!

The latest addition to the Napoleonic Battles series of games is here! Republican Bayonets is focused on the battles from 1792 - 1800 in the French Revolutionary Wars - as the young French Republic was establishing itself and the various monarchies of Europe attempted to squash it. Battles from France, Holland, Belgium, Switzerland and Germany are included. Further details can be read on the product page.


Panzer Campaigns Gold Releases Continue

Korsun '44 is the next title to be upgraded to the new Gold standard. Further details can be read on the product page. Existing owners please see the Updates page.

Previous releases include Kharkov '43, Moscow '41, Budapest '45, Kursk '43, Rzhev '42, Minsk '44, Kharkov '42, Moscow '42, Stalingrad '42, Smolensk '41 & the Demo - Mius '43.


Modern Air Power SPV Update Available

An update to the Single Player Version of Modern Air Power for MAC is available. This update adds in support for Macintosh 10.13 (High Sierra). More information can be found on the Modern Air Power page.


New page added to the site, Mailing List

Mailing List page has been published to allow you to join our e-mail list and have news delivered straight to your desktop or mobile device. Link to previous mailings also included to give you an idea of the content and frequency of our communications.


Various titles marked down

We have marked down a variety of titles in our store to $29.95, representing 8 different series we publish. See the product group "Sale Items" for a detailed listing.


Campaign Petersburg released!

The latest addition to the Civil War Battles series of games is here! This also marks the initial release of the Wargame Design Studio versions of the Civil War Battles games. Further details can be read on the product page.


New page added to the site, Resources & FAQ

Resources & FAQ page has been published to assist our customers. Also, please note that the free download content previously on the "Updates" page has been moved to the new Resources page.


JTS Menu Update Available

1.02 of the menu program is available for download. This menu program should be installed in the same root folder you install your John Tiller Software games. It will provide you with an interface for browsing and opening all files and programs associated with your installed games. This menu program will be particularly useful for Windows 10 users since installations under Windows 10 do not include the game folder in the Start menu. Additionally, a package of various backgrounds for the Menu program has been added. These downloads are available from the Recources page, under "Downloads".


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