Zen GM has single-player sports simulation games for Basketball, Baseball, and Football. Set your roster, make trades, draft prospects, manage your finances, and try to build a dynasty. Play Basketball GM , Play Football GM or Play Baseball GM in your browser now, completely 100% free!
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April 26, 2017 - (Comments Off on MOBA GM is now on Steam Greenlight! Please vote YES!)
The Steam Greenlight link has video, images, and a description.
However, for more background you can read the FAQ.