Looking through the games of Aspyr Media and LucasArts, available on Steam, I noticed that some of their games have had their prices changed.
For Aspyr Media:
1701 A.D. Gold Edition
US: $29.99
UK: £24.99 (35% higher)
EU tier 1: 27,99€ (33% higher)
EU tier 2: 20,99€ (0% lower)
EU tier 3: 20,99€ (0% lower)
Cryostasis
US: $29.99
UK: £24.99 (35% higher)
EU tier 1: 27,99€ (33% higher)
EU tier 2: 20,99€ (0% lower)
EU tier 3: 20,99€ (0% lower)
Death to Spies: Moment of Truth
US: $29.99
UK: £20.99 (13% higher)
EU tier 1: 27,99€ (33% higher)
EU tier 2: 20,99€ (0% lower)
EU tier 3: 20,99€ (0% lower)
Death Track: Resurrection
US: $19.99
UK: £15.99 (30% higher)
EU tier 1: 18,99€ (36% higher)
EU tier 2: 14,99€ (7% higher)
EU tier 3: 14,99€ (7% higher)
Men of War
US: $29.99
UK: £24.99 (35% higher)
EU tier 1: 27,99€ (33% higher)
EU tier 2: 20,99€ (0% lower)
EU tier 3: 20,99€ (0% lower)
NecroVision
US: $29.99
UK: £24.99 (35% higher)
EU tier 1: 27,99€ (33% higher)
EU tier 2: 20,99€ (0% lower)
EU tier 3: 20,99€ (0% lower)
Stubbs The Zombie
US: $9.99
UK: £5.99 (3% lower)
EU tier 1: 9,99€ (43% higher)
EU tier 2: 7,99€ (14% higher)
EU tier 3: 7,99€ (14% higher)
Top Spin 2
US: $9.99
UK: £5.99 (3% lower)
EU tier 1: 9,99€ (43% higher)
EU tier 2: 7,99€ (14% higher)
EU tier 3: 7,99€ (14% higher)
To those in tier 1, I feel your pain.
For LucasArts:
Indiana Jones and the Fate of Atlantis
US: $4.99
UK: £2.99 (3% lower)
EU: 3,99€ (14% higher)
Indiana Jones and the Last Crusade
US: $4.99
UK: £2.99 (3% lower)
EU: 3,99€ (14% higher)
LOOM
US: $4.99
UK: £2.99 (3% lower)
EU: 3,99€ (14% higher)
Star Wars Starfighter
US: $4.99
UK: £2.99 (3% lower)
EU: 3,99€ (14% higher)
The Dig
US: $4.99
UK: £2.99 (3% lower)
EU: 3,99€ (14% higher)
The rest have a difference of over 20%.
I'm not sure when this change in prices occurred. To me this shows that the strategy of not buying overpriced games on Steam is working and it forces companies to lower their prices, as I don't believe they lowered the prices out of the goodness of their hearts, but rather because their games are not selling.