Mortal Kombat 11 is another game that looks extremely different whatever you choose HDR or SDR on OLED.
HDR= very bright image, the game doesn't have any luminance slider, just a normal gamma one, shadows in the game becomes grey or very dark greys, but never pure blacks, the crystals in the menu becomes all grey, colors are good, quite pale, the scenarios are quite washed out, all the details are pretty visible.
SDR= as always on OLED, shadow are BLACKS, the crystals in the main menu now display pure blacks, the image is very VERY contrasty, scenarios are quite dark, with shadows being very black or pure dark, but not quite crushed, details are still there, just as always on oleds are very Hard to see.
at the end, what was the developer intention???