Users who own this game also own:

The Binding of Isaac
The Binding of Isaac
Left 4 Dead 2
Left 4 Dead 2
Portal 2
Portal 2
Portal
Portal
Half-Life 2
Half-Life 2

Users who love this game also love:

Half-Life 2: Episode Two
Half-Life 2: Episode Two
Half-Life
Half-Life
Castle Crashers
Castle Crashers
Cave Story Plus
Cave Story Plus
Half-Life 2: Episode One
Half-Life 2: Episode One