I am trying to remember a game my dad played at least 10+ years ago.

Definitely on a windows pc.

I remember the game had a grid based inventory where a staff item went diagonally across so took up a lot of space. I thought the idea of having to Tetris your inventory was cool.

I think it was a fantasy open world setting. The main character was probably male. I think it was 3D but don’t remember if it was first or third person

I remember at one point he was walking across a swamp? A Forrest? And came across a house / people he ignored because it was part of a quest he hadn’t yet pick up? Gotten to that point in the quest yet?

I also remember (I hope this is the same game) that lockpicking/ open locked chests was solving a puzzle with colored beads? Colored gems? Buttons? I Remember thinking this is a bad locking system because any sufficiently motivate adventure could solve the puzzle and get the stuff inside.