Robert Niemeier
| Challenge | Status | End | Votes | Entries | Players |
|---|---|---|---|---|---|
| Make it Minimal | closed | 2 years, 7 months ago | 9600000 | 21136 | 5310 |
| Man Made Flying Objects | closed | 2 years, 4 months ago | 10100000 | 12706 | 4304 |
| Obstructing the View | closed | 2 years, 2 months ago | 10100000 | 8921 | 4430 |
| Faces in Objects | closed | 2 years ago | 5000000 | 2697 | 2662 |
| Religions Of All Kinds | closed | 1 year, 10 months ago | 10500000 | 10074 | 4934 |
| Three of a kind | closed | 1 year, 7 months ago | 9600000 | 7910 | 3890 |
| Make Yourself Comfortable | closed | 1 year ago | 6369633 | 9657 | 2391 |
| Impressive Architecture | closed | 10 months, 2 weeks ago | 6087121 | 9559 | 2402 |
| Classic Still Life | closed | 5 months, 2 weeks ago | 7145690 | 5313 | 2571 |