The Climbing Thing appears as a set of ice axes or picks that sparkle yellow. When picked up, the Climbing Thing will allow the player to climb up vertical surfaces by holding the walk key. This can also be used with the jump key, since the player is capable of performing massive leaps simply by turning while climbing. The Climbing Thing is useful for avoiding enemy fire as well as traversing levels more easily. While most are integral to gameplay of some levels, several Climbing Things appear in later levels as a means of unlocking certain secrets.