Users who own this game also own:

AudioSurf
AudioSurf
Half-Life 2
Half-Life 2
Portal
Portal
World of Goo
World of Goo
Darwinia
Darwinia

Users who love this game also love:

Bastion
Bastion
Torchlight
Torchlight
Uncharted 2: Among Thieves
Uncharted 2: Among Thieves
God of War
God of War
Machinarium
Machinarium