1+1=？
7 achievements
Common×7
About 1+1=？'s achievements
1+1=？ has 7 Steam achievements. The rarest is "Satan Report!", earned by just 64.7% of players. 2 SteamVault members have 100%-completed it so far. Below is the complete achievement list with global rarity and a full achievement difficulty breakdown.
Rarest achievement
64.7%
of players earned "Satan Report!"
SteamVault 100%s
2
members fully completed it
Community Ratings
No ratings yetDifficulty—
Easy → Brutal
Enjoyment—
Meh → Loved it
Grindiness—
No grind → Huge grind
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All 1+1=？ achievements
7 achievements
Common64.7%
Common71.7%
Common80.7%
Common93.9%
Common96.7%
Common96.7%
Common97.7%