Piston: Difference between revisions

{{era|H2}}

{{ratings}}

[[Image:Piston.jpg|thumb|right|A closed Piston.]]

A '''piston''' is a [[Forerunner]] device. They are installed within facilities like the [[Sentinel Wall]] as vertical "[[Door|doors]]" to get from level to level within the multi-tiered construct. The pistons have sensitive control-strips that open the piston when fired upon or switched. The piston then splits in two, and allows the [[Sentinels]] and [[Constructors]] to move to the lower or to the higher level they desire. The openings are fairly large, however, and therefore allow larger creatures, such as [[Sangheili|Elites]], to move through. However, the shafts pistons guard are almost always vertical, so moving up through them is impossible without a thruster of some kind. Some Pistons do not split in two, but the ones that reveal the winding tunnels just lift upwards, downwards and away.<ref>'''[[Halo 2]]''', campaign level, ''[[Sacred Icon (Level)|Sacred Icon]]''</ref>

*In ''[[Halo 3: ODST]]'', in the level [[Data Hive (Level)|Data Hive]] which is set in [[New Mombasa]]'s [[New Mombasa Data Center|Data Center]], devices called "Data Stacks" are encountered. They function similarly to the pistons.