With the filter

Which one? There a dozens commonly used ones. All of these games are from the CRT era and were developed on and for CRT monitors.

Might and Magic Book One

Notice the dithering pattern on the characters in this screenshot:

https://www.mobygames.com/game/1619/might-and-magic-book-one-secret-of-the-inner-sanctum/screenshots/dos/115836/

This was only done for CRTs, since it results in blended pixels.

Heroes of Might and Magic 2

More CRT dithering everywhere, just two generations later and with more colors and fine detail - but it’s still the same technique:

https://www.mobygames.com/game/1513/heroes-of-might-and-magic-ii-the-succession-wars/screenshots/dos/634491/

Carmageddon

https://www.mobygames.com/game/367/carmageddon/screenshots/dos/887670/

Notice the color banding on the textures? CRTs blend that together, resulting in a much smoother look even with software rendering.

Elder Scrolls Arena

https://www.mobygames.com/game/803/the-elder-scrolls-arena/screenshots/dos/305893/

Our old friend Mr Dithering makes an appearance once again.

I hope I’ve made my point clear. It’s fine if you prefer the clean pixelated look of LCD displays, but it’s clear that this is not what these games were meant to look like.