I don't know if Gothic 1 and 2 qualify as true cult classics or not, but clunky controls and interface aside, these are two of the best games I have played in my life. Gothic 2 especially. The games offer an atmosphere like nothing I've ever played. The soundtrack, themes, and overall color pallete provide this rich and stirring ambience that always manages to make me feel as though I'm exploring an ancient pine forest on a dark, rainy day. See for yourself.

https://youtu.be/HZ1tyNFODM4

You can feel the spirit of the entire franchise contained within the first two minutes of that audio track, perfectly encapsulated. It was an entire world apart and years ahead of its time. If it resonates with you, then these games are absolutely worth the initial difficulty of figuring out those ridiculous keyboard controls. But if you're really struggling with them, just read up on the Gothic 1 storyline and then skip straight to Gothic 2. It picks up right where the first leaves off. You won't miss a tremendous amount, and the controls and gameplay are infinitely improved. However, sticking G1 out long enough to figure out what you're doing will make G2 far more rewarding when you reunite with various characters and revisit previously explored areas.

A studio is remaking Gothic 1, but everything I've seen of it so far is about as faithful to Gothic 1 as The Dark Tower movie was to the books. They've massacred it. So stick with the originals.