I tried that but there are no versions listed to select on the betas tab of the properties of the game in steam, just the option to not join beta. I went ahead and re-downloaded and installed the game into the same location i've had the non-steam version installed for years before updating the game client and loading the test server.
Here are my PC Specs:
OS : Windows 10 Professional Build 18363.1198
CPU : AMD Ryzen Threadripper 1920X (first gen)
Ram : 32GB DDR4 2666
Graphics : Nvidia Geforce GTX 1080 Ti
Monitor : LG GSM76F9 UltraWidescreen
Resolution : 2560 x 1080 (borderless mode)
So far I have found two issues on the test server.
Issue One :
Some screens have overlapping text. For example, when I right-click on my "quest totem" and select "Quests" and then click "new quest" the third line down has overlapping text which I can only guess is the status and a new expiration field. This happens even with the scaling set to 100. See the attached xsyon-new-quest_scaling-100.JPG.
For comparison, if I load the live version of the game I don't see overlapping text here. See attached xsyon-new-quest_no-scaling.JPG.
Note : When opening two windows at once such as tribe and social the navigation buttons at the bottom appear to have this same effect however in this case what you are seeing is the text from the background window partially visible behind the labels for the window in the foreground due to the window being designed to be see-through. A nice touch when the only thing in the background is the game but makes it hard to read the labels until one decides to move one of the windows.
In the case above with the new quest there is actually no text in the window behind and moving the new quest window doesn't make the issue go away.
Issue two :
Any time I try to set a value for settings in a quest such as title, goal, or time limit once I hit "apply" the game crashes with no error presented. Viewing the crash log I see that this happened when a "Programm Fault occured" (Access Violation").
In the live version of the game the same thing does not happen, I'm able to create quests without issue. See attached 'Xsyon-crash-logs.zip' which includes the client, launcher, and crash logs from right after I generated this crash by trying to set the title on a new quest to "Test quest" (all other settings left at default)