How do you get Portal 2 skins?

Question

Only a small number of Skins that were made available as part of some individual Portal 2 pre-order promotions can be acquired by purchasing them from the Robot Enrichment Store.

Hagrid P Hazard · Accepted Answer

Only a small number of Skins that were made available as part of some individual Portal 2 pre-order promotions can be acquired by purchasing them from the Robot Enrichment Store.

How do you get Portal 2 skins?

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