This game is easy and fun:
Games played by others:
| Mission | Clicks | Avg. hardness** |
|
| Rhodium(III) chloride >> Parthenon | avg. 9, record 9 | 1 | Play! |
| RER >> 14th century | avg. 7, record 7 | - | Play! |
| Kite (bird) >> Cosmic microwave background radiation | avg. 6.7, record 5 | 2 | Play! |
| Blue Wildebeest >> Stonehenge | avg. 5, record 5 | 1 | Play! |
| Promethium >> PSR B1620-26c | avg. 5, record 5 | - | Play! |