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UFO: Unidentified Falling Objects achievements, rarest first.
Every achievement in UFO: Unidentified Falling Objects, ranked by how many Steam players have unlocked it. Global completion rates from Steam, refreshed daily.
The rarest achievement
All Challenges Complete
4.5%
of players
- Achievements
- 14
- Rarest
- 4.5%
- Ultra rare (under 5%)
- 1
- Average completion
- 11%
1
All Challenges Complete
4.5%
2
World 6 Completed
5.5%
3
World 5 Completed
5.9%
4
MothershipHidden
Hidden achievement. Description revealed on unlock.
6.4%
5
World 5 Challenges Complete
7.0%
6
World 4 Completed
8.3%
7
World 3 Completed
8.7%
8
World 4 Challenges Complete
9.9%
9
World 3 Challenges Complete
12%
10
World 2 Completed
13%
11
50 Combo
16%
12
World 2 Challenges Complete
17%
13
World 1 Completed
19%
14
World 1 Challenges Complete
23%
Percentages are Steam's global unlock rates across all players who own UFO: Unidentified Falling Objects, refreshed daily. Under 5% is marked in the lit blue.