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Portal
6 / 15 achievements40%
Ultra Rare0 / 5
Very Rare0 / 4
Rare1 / 1
Uncommon1 / 1
Common4 / 4
About Portal's achievements
Portal has 15 Steam achievements, 5 of them ultra-rare — unlocked by under 5% of players. The rarest is "Basic Science", earned by just 2.8% of players. Across 52 SteamVault hunters who reached 100%, full completion takes a median of about 6 hours. Below is the complete achievement list with global rarity, a difficulty breakdown, and a SteamVault guide for every achievement.
Rarest achievement
2.8%
of players earned "Basic Science"
SteamVault 100%s
52
members fully completed it
Median to 100%
6h
typical time to full completion
Community Ratings
2 ratingsDifficulty5.5 / 10
Easy → Brutal
Enjoyment7.5 / 10
Meh → Loved it
Grindiness3.0 / 10
No grind → Huge grind
Want to rate Portal? Sign in with Steam — one rating per person.
All Portal achievements
Your unlocked achievements
15 achievements
Rare18.1%✓ 6 Jul 2026
Common52.1%✓ 4 Jul 2026
Common55.4%✓ 4 Jul 2026
Common63.2%✓ 4 Jul 2026
Uncommon48.5%✓ 4 Jul 2026
Common81.0%✓ 4 Jul 2026
Locked — 9 remaining
Ultra Rare2.8%
Ultra Rare2.8%
Ultra Rare2.8%
Ultra Rare4.1%
Ultra Rare4.3%
Very Rare9.0%
Very Rare9.2%
Very Rare12.0%
Very Rare14.1%