I am re-posting it again...
Some people find it's easy to follow, some are getting frustrated
But, that's the best I could offer at the time.
You basically have to manually animate a first step down and then with assistance of Pose Manager plug-in make a full 2 steps loop and then replicate it over timeline.
I personally use this technique for Up or Down steps with some additional tweaks which best suit for character mood.
Note: you must have even steps for stairs and a terrain made for it (or converted from). Otherwise there is much more manual work would require.
Edited
2 Years Ago by
4u2ges