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{{era|Forerunner|HCW}} | {{era|Forerunner|HCW}} | ||
[[File: | [[File:H2A-Forerunner piston.png|thumb|250px|A closed piston within the [[Sentinel Wall]].]] | ||
A '''piston''' is a [[Forerunner]] device. They are installed within facilities like the [[Sentinel Wall]] as vertical "[[door]]s" 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 [[Aggressor Sentinel]]s and [[Constructor]]s 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]], 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> | A '''piston''' is a [[Forerunner]] device. They are installed within facilities like the [[Sentinel Wall]] as vertical "[[door]]s" 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 [[Aggressor Sentinel]]s and [[Constructor]]s 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]], 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> | ||
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==Gallery== | ==Gallery== | ||
<gallery> | <gallery> | ||
File:H2-Piston_3.png|A piston in ''Halo 2''. | |||
File:Piston.jpg|A [[Constructor]] accessing the holographic controls of a piston. | File:Piston.jpg|A [[Constructor]] accessing the holographic controls of a piston. | ||
File:H2 - Piston 2.jpg|Another piston being activated by a Constructor. | File:H2 - Piston 2.jpg|Another piston being activated by a Constructor. | ||
</gallery> | </gallery> | ||
==List of appearances== | ==List of appearances== | ||
*''[[Halo 2]]'' {{1st}} | *''[[Halo 2]]'' {{1st}} | ||
*''[[Halo 2: Anniversary]]'' | |||
==Sources== | ==Sources== | ||
<references/> | <references/> | ||
[[Category:Forerunner technology]] | [[Category:Forerunner technology]] |
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