Bloodwych is a very primitive dungeon crawler that had two features that I haven't seen used since.
The first one is the ability to split up the party. IIRC your "main party" had 4 party members, which could then be detached into 4 parties of 1, 2 parties of 2 or a mix divisible by 4. Not very useful for combat situation, but very useful for scouting purposes and to see what that damn switch did in that other room.
Oh please. Realms of Arkania did that. Fate: Gates of Dawn did that. Brany Skeldaly did that (and it was even useful for combat for a change).
The second one is the conversation system. I have rarely seen such a detailed conversation system in any game. You can greet humanoids, ask them how they're feeling, ask them for advice, compliment or berate them or even trade with them. Surprisingly advanced, yet almost wasted on a game like Bloodwych.
Fate: GoD again. You could even recruit almost any NPC you encounter into party, in theory anyway.