traVRsal offers a number of challenging room-scale experiences allowing for constant natural locomotion without the need to teleport or use thumb sticks.
Get it on App Lab or through SideQuest! A PC version for Rift can be found on the GitHub release page.
Hint: For better immersion it is recommendable to either reduce the Guardian sensitivity or set some padding in the settings of traVRsal so that it will not pop up.
For a description of traVRsal features, check out the wiki.