# Host\_timescale = TAS?

**URL:** <https://forums.sourceruns.org/t/host-timescale-tas/2851>\
**Category:** Half-Life 2\
**Created:** [May 5, 2016, 2:18am UTC](https://forums.sourceruns.org/t/host-timescale-tas/2851 "2016-05-05T02:18:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![donnaken15](https://b-cdn.sourceruns.org/letter_avatar_proxy/v4/letter/d/a9adbd/32.png) [@donnaken15](https://forums.sourceruns.org/u/donnaken15)\
**Post date:** [May 5, 2016, 2:18am UTC](https://forums.sourceruns.org/t/host-timescale-tas/2851/1 "2016-05-05T02:18:04Z")

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I was messing around on the Portal Project-Alpha mod and played through the whole campaign maps with host\_timescale to 0.1, and after playing it, (i actually recorded this with the demo features) it looked really funny when i played the demo back because the game wouldnt slow down my mouse movement. XD  
This sort of turned out to me this can be used to do Source Tool-Assisted speedruns…? :o

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**Author:** ![YaLTeR](https://b-cdn.sourceruns.org/user_avatar/forums.sourceruns.org/yalter/32/553_2.png) [@YaLTeR](https://forums.sourceruns.org/u/YaLTeR)\
**Post date:** [May 5, 2016, 5:10am UTC](https://forums.sourceruns.org/t/host-timescale-tas/2851/2 "2016-05-05T05:10:13Z")

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A type of run using host\_timescale is usually called a TSA for TimeScale-Assisted. There has been a HL2 TSA run in the works but it’s dead.