Here is the full list of all 22 Locomotion achievements.
Travelled a total of 1000km
Travelled a total of 2500km
Travelled a total of 5000km
Travelled a total of 10000km
Collected all the gold from all levels
Collected all the gold from Western levels
Collected all the gold from Jungle levels
Collected all the gold from Arctic levels
Collected all the gold from Space levels
Collected all the gold from the Finale levels
Click a tiny horse (Western)
Travelled a total of 5000km backwards
Reset 10 times
Complete the game
Leave the gold with the aliens
Keep all the gold for yourself
Click all tiny horses
Click a tiny horse (Jungle)
Click a tiny horse (Arctic)
Click a tiny horse (Space)
Click a tiny horse (Finale)
Complete the level 'Bomb with the Wind' without exploding a carriage