The TRON1 has gotten a lot of coverage in the media lately. It is a multi-modal biped robot wheel wheel, sole, and point-foot configurations that enables it to walk in humanoid form or just roll on the ground. It comes ready to go out of the box and has a fully open SDK. This video shows the TRON 1 taking on complex terrains. It can achieve stable movement with 10kg payload.
This robot can handle stairs, mud, and stone paths. The one in this video uses Yimoos Technology UWB Kit for precise following. It uses dynamic balancing for stable movement. You can find out more here.