Originally Posted by Dr. A
For your game specifically, I would suggest heavy elements of investigative gameplay. For e.g. What is this artifact - can someone tell me more about it? Maybe some researcher's notes will shed light on it? What can I surmise based on my own current abilities? I've encountered a trap/puzzle in the dungeon - what are the clues to solving it?
A feature I would request is elaborate and instructive feedback on failed skill checks. So instead of "Lockpicking failed" or "Your lock-picking skill is not high enough", you could say "The mechanism proves too difficult for your fumbling fingers and snaps your lockpick. You may need a better lockpick or more importantly, greater skill at using one"