Underground is the 141st level in Chip's Challenge 1. All that is required to defeat Underground is patience and knowing where a paramecium moves; this is also good practice for trapping paramecia or for releasing them. Once these basic maneuvers are mastered, this level becomes easy, as can be seen in the AVI. At its quickest, Underground's solution spans a mere 31 seconds. While slower solutions often trap paramecia progressively, this speed solution is able to do them perfectly in line with normal moving.