Because Mario is not available on steam. The next best thing is here. I am proud to say that DOOM is now a Strand type game. It now has platforming. It has jumping. It has walking.

Perhaps the only contender against Hideo Kojima's excellent work. For me, they are both about the same. But you may have different opinions. All in all, it has walking.

Strand Type Game. One of the reviews says "Most of the time you spend in this game will be walking. Quests often have you walking long distances ... between two areas..." Verdict: It has walking.