Deep Silver and Humble Bundle have joined forces to present us with a ridiculous deal. You can pay what you want for Saints Row: The Third, Saints Row 2, Risen 2 Gold Edition and Sacred 2, or beat the average for Dead Island GOTY and all the Saints Row: The Third DLC. If you want to pay more for a mediocre and pointless extra, you could even chip in $25 for Dead Island Riptide, but don't.
Considering that the average price is currently £3.23, you should probably get on this fast and hard. You'll get bundled Steam codes - one for the PWYW batch, and another for the beat the average content. Credit to blizeh @ HUKD!