When using agent nine on the missions through the air vent. Duck down
nearly all the time. If behind any of the tall objects you can stand up
but don't show yourself, coming out start crawling again. When facing the
rhynocs under manholes it's best to jump down when there underground and
when they pop up suck them in. This helps loads when coming back to the
air vent to talk to sparks and give him the key half. Sent in by Lynn Stewart
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