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An inbounds no save/load abuse tool-assisted speedrun of Portal without jumping with a final time of 7:52.440.

This run was made by    / @evanlin96069   in 21 segments over about 3 years (completed in 2025-07-20), and was inspired by the Portal Jumpless segmented run, which can be found here:    • Portal Jumpless Segmented in 8:50.100  

Since this run was completed on build 5135, some glitches may be harder or outright impossible to perform on the Steam version. Furthermore, it should be noted that this run predates the discovery of build 4104, as well as the "singularity warp" glitch, and is not fully optimal by today's standards.

Tool used:
SourcePauseTool https://github.com/YaLTeR/SourcePause...

Timesheet: https://docs.google.com/spreadsheets/...
Demos, scripts, and saves: https://github.com/lipsanen/source-tas

Enjoy!
http://sourceruns.org
  / sourceruns