The Humble Weekly Sale: Tripwire Interactive

The Humble Weekly Sale: Tripwire Interactive is a collection of up to 3 games by Tripwire Interactive with a pay-what-you-want model, starting with a minimum amount of $1. Buying the bundle would get you Steam keys for the games and the soundtrack of the games in MP3 and FLAC format.

The sale contains the following games:

• Red Orchestra: Ostfront 41-45
• Red Orchestra 2: Heroes of Stalingrad (Windows only)

If more than the average was paid, the bundle would also include:

• Killing Floor

The bundle was available for one week only; the paid amount could be freely split between the developer, the Child's Play and Electronic Frontier Foundation charities and the bundle organizers.