Portal 2 Lab Rat Challenge Map @TopHATTwaffle
Portal 2 Lab Rat Challenge Map  @TopHATTwaffle
Uploaded May 2011 | Updated September 2026, 5 hours ago
This is the finished challenge map that will be included in Portal 2 Lab Rat.

Don't expect anything else about the mod for quite some time now. Follow me on Twitter: twitter.com/TopHATTwaffle Support me on Patreon: patreon.com/tophattwaffle
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Portal 2 Lab Rat Challenge Map

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