It's not a binary spectrum between action game and walking simulator.
Tomb Raider had some sections that probably fit the walking simulator genre, but also areas of action and puzzle games.
Walking simulator is defined by moving and exploration. Interactions usually involve reading, or changing your environment (not in ways to unlock new areas, but perhaps to see new things). Playing one, you clearly note the vibe. There isn't much to do except move forward and see/experience new things, building out a plot and understanding of a narrative as you do so. You don't generally drive the plot through your actions, but instead learn about it.
Tomb Raider is a pretty standard adventure game with a couple major exceptions:
- There's a lot of combat.
- The world is 3D rather than being 2D backgrounds.
But most of your time is spent wandering around solving puzzles and trying to figure out where to go next. It would be a better game, in my eyes, if they took the combat out entirely. Compare Indiana Jones and the Fate of Atlantis.
Tomb Raider had some sections that probably fit the walking simulator genre, but also areas of action and puzzle games.
Walking simulator is defined by moving and exploration. Interactions usually involve reading, or changing your environment (not in ways to unlock new areas, but perhaps to see new things). Playing one, you clearly note the vibe. There isn't much to do except move forward and see/experience new things, building out a plot and understanding of a narrative as you do so. You don't generally drive the plot through your actions, but instead learn about it.