According to COST.games Portal can be purchased at Steam for $9.99.
The lowest price ever for Portal is $0.99.
Discount on Portal
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COST.games gives Portal a score of 92.
The average score based on 27 critics reviews on Metacritic is 90 points.
4,758 users of Metacritic gave Portal an average score of 8.9.
On Steam, 98% of the 129,579 players gave a positive rating.