Complex sentence: Players operated a remote-controlled bipedal robot known as a Hostile Environment Combat and Tactical Operations Remote, or H.E.C.T.O.R. The robot's characteristics were customizable, ranging in mass from 150 kg to 220 kg, and stood about 2 meters tall.
Split into simpler sentences: Players operated a remote-controlled bipedal robot known as a Hostile Environment Combat and Tactical Operations Remote, or HECTOR. The unit's characteristics were customizable, ranging in mass from 150 kg to 220 kg, and stood about 2 meters tall.