It could just be due to newer versions of Windows causing things to break

Game: Requiem: Avenging Angel
Installer MD5: b6f717fffbe1f0d772f6272aab66f26a setup_requiem_avenging_angel_2.0.0.8.exe
WineHQ AppDB link: https://appdb.winehq.org/objectManager.php?sClass=application&iId=6733
CodeWeavers link: (none yet)

Distro: Linux Mint 18 Cinnamon 64-bit
Kernel version: 4.4.0-43
Graphics card: Nvidia GeForce GTX 750Ti
Graphics driver & version: Proprietary 370.28
Wine version(s) tested: Wine Staging 1.9.20 via PlayOnLinux, CrossOver 15.3.1

Install notes: Requires override for ddraw (native, builtin) and winmm (native, builtin)
Doesn't capture the mouse even with "Automatically capture the mouse in full-screen windows" enabled - must set MouseWarpOverride to "force".
It may not be necessary, but I set compatibility mode for Win98 just in case.
If using PlayOnLinux, run the game from/create a shortcut for "Requiem.exe"
If using CrossOver you'll need to create a new shortcut as GOG's shortcut points to the 3DFX version, which doesn't work in Wine (it does actually run using CrossOver but has graphical glitches).
How well does it run: Very well
Details: Played for a while, there is some stuttering that I haven't been able to resolve but it's otherwise playable and seems to run very well. Tested with virtual desktop enabled.

Watch out for a possible bug with the Direct3D version though: Source.

Although it looks like this problem does not occur in Wine - I played from a save up to that part many times while trying to see if anything helped with the stuttering and never had any problems, however I did have that problem when I tried it on my Windows install.

Thank you for the ddraw tip. And in a plus i have my desktop resolution in D3D.

Are you using Glide there? It's the only thing which worked for me, and even then it's rather buggy (the UI of the HUD is messed up with ghosting).

I'm using the Direct3D version, which needs the override for ddraw set before it'll work. As I mentioned in the report the 3DFX version doesn't work for me except in CrossOver (where it's unplayable due to graphical glitches instead).

I did the override, but it doesn't work at all for me with d3d. I'll give it another try, may be latest staging Wine makes a difference.

I just tested with Wine 1.8.4 and 1.9.20 and it still seems to work with those versions here.

1.8.5 isn't available via POL yet

Game: Odallus - The Dark Call
Installer MD5: e82f2380b0fed4f2de62db4fdd98217d setup_odallus_the_dark_call_2.5.0.7.exe
WineHQ AppDB link: https://appdb.winehq.org/objectManager.php?sClass=application&iId=17036
CodeWeavers link: None

Distro: Antergos 64-bit
Kernel version: 4.7.6-1 Zen
Graphics card: Nvidia GeForce GT240M
Graphics driver & version: Proprietary 340.98-1
Wine version(s) tested: Wine Staging 1.9.20 and Wine 2.1 via PlayOnLinux

Install notes: None
How well does it run:Almost Perfectly
Details:

*The screen will flicker in a split-second in each screen load, beside the main game.

*The opening sequence will be out of focus, thus you need to Alt+Tab back to it so the controls will work.

*Tested with Virtual desktop and CSMT enabled as well and no major issues has been found.

*The gamepad will cause the game to crash at the warning screen. Unless you disable the (event) controller type from the Control Panel. However, the keyobard keys won't work unless the controller is plugged off before running. (This step is not required if you are using Wine 2.1)

*Further levels weren't tested. Only the 1st level of the game with the keyboard.

I've updated the summary and looks like there is a very small improvement, the game will run but it'll crash at the warning screen. Tested with Xbox 360 controller and DualShock 4.

The "Program Odallus.exe found a serious problem and must end the process. Sorry for the inconvenience." one. I've installed xinput and dinput. Still the same error.