Oh, I see I'm missing 32-bit gstreamer1.0-libav. Testing it now.

UPDATE: yep, that was it. Thanks for the hint! The game is working now.

Game: Dorfromantik
Version: 0.1_(64bit)_(45830)
WineHQ AppDB Link: N/A
ProtonDB Link: Dorfromantik
Installer MD5:
151af2fafbdfcfea08e870c277f85ade setup_dorfromantik_0.1_(64bit)_(45830)-1.bin
72f60155920e69c71a428a756821445d setup_dorfromantik_0.1_(64bit)_(45830).exe

Distro: Linux Mint 19.3 "Tricia" | Cinnamon | 64-bit
Kernel: 5.4.0-65-generic
Graphics: NVidia GeForce GTX 670
CPU: Intel i7-3930K @ 3.20GHz × 6
Wine Versions: Wine Staging 6.1 / Proton 5.9 GE

Install Notes:
64-bit wine prefix.
No winetricks required.

How does it run:
1) Played about 3 hours without gameplay or graphical issues.
2) Wine Staging 6.1 loses mouse after alt-tabbing or mouse leaving game window -- cannot relock, requires reload. This issue is not present with Proton.

Details:
The mouse lock issue for Wine Staging 6.1 can be managed by going into winecfg under the Graphics tab and checking "Automatically capture the mouse in full-screen windows", but if you need to be able to alt-tab out, then using Proton is preferable.

Game: Siege of Avalon: Anthology
Version: 1.0
Installer MD5: 09679acf885bdb40dbb27296a682e69e setup_siege_of_avalon_anthology_1.0_(46183).exe

Distro: Linux Mint 20.1 | Cinnamon | 64-bit
Kernel version: 5.8.0-48-generic x86_64
Graphics card: Nvidia GeForce GTX 1650 460.39 / Intel UHD Graphics
Wine version(s) tested: Wine 6.3-staging
WineHQ AppDB link: no entry for this game

Install notes: Installs correctly.
How well does it run: Does not work. Initial pop-up appears (video settings, fullscreen/window mode, language selection). There seems to be display issues with the window (violet font and weird gradient as a background). Next the game's window opens – it's white and turns black. No sound, no further reaction for any input.
Details: I'm using PlayOnLinux (without their predefined scripts). I've tested 32 and 64-bit installations, various Windows versions and tried to add some libraries, with no effect.

Does you tested with DXVK? It supports mostly DX10.

Yes, exactly the same result with DXVK_173 installed.

Thank you for taking time to check.

Hello, I got Shadow Man Remastered running on my Mint 20 perfectly. But one thing just didn't work: when climbing I can't move sideways. I've looked around and found some walkthroughs on windows where people don't have this problem. Can someone test if it is a bug on wine or in the game itself?

UPDATE: I've found that if after I keep the middle mouse button pressed and move the camera around and return to normal position the sideways movement finally works.