This is without a doubt my favourite RPG that I've had the pleasure to play. Kingdom Come has the most immersive game world that I've ever experienced, and it's not down to the potato graphics that I achieved using less than the recommended hardware (RX 570 4GB). That's not to say that every aspect of the game is consistently flawless, but the overall experience is greater than the sum of its parts. I probably ended up putting well more than 100 hours into it and enjoyed every second of it. The game is well worth even full release price, especially if you love the medieval setting.
I think Knights of the Old Republic (KOTOR) has a lot going for it, but unlike most other people here I disagree with the premise that this game aged gracefully. KOTOR has great story telling, likable characters and tons of opportunities to collect snippets of lore. The area that KOTOR lacks severely in is its world design and the overall amount of graphical assets. It's really clear that the world design came as a compromise to allow the game to run on ancient hardware. You and your party members travel through small sectors, almost entirely devoid of detail. Many of these sectors consist of 1-3 hallways, with half a dozen rooms branching off (with the exception of dungeons). Every hallway in the game looks the same. Most of the rooms in the game look exactly the same. Most things that your eyes fall upon consist of flat, featureless surfaces. The tiny amount of art assets in this game is painfully evident, and really makes it look like modern unity shovelware. However this game is not shovelware at all. KOTOR's ugly visage is thoroughly redeemed by its story telling. Although the main quest line is delivered through the old and reliable method of fetch quests, it never really gets stale. At every stage of the fetch quest you'll find compelling subplots and opportunities to advance the sub plots of your party members. Surprisingly, most of these subplots are not even cheesy (subjective). The delivery of the party members' subplots is also carefully paced and encourages you to use them in your party. The main plot is a bit cheesy at certain points, but is nonetheless enjoyable. Overall the game offers a good experience, hampered significantly by the world design and small number of art assets. KOTOR is definitely worth a fiver. Maybe even a tenner if you're craving star wars.