Little list of a few bugs I have encountered
Changing the game victory conditions changes the current world name.
Unit design
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Sorting does not working in unit design manager
no graphics for any defensive item that I have tried (this may not be a bug and just the way it is)
Map
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Minimap is seethrough
every time the map refreshes (ie you move a unit) every eveny unit that you have already spotted becomes visible for a brief second
telling a unit to move beside water give a graphical glitch.
and of course the documented Alt-Tab bug, (which ended this playtest abruptly when attempting to take a prntscrn/paint screenshot)