This deal has blown up on HUKD with nearly 300 votes already, so I thought that it's worth a share here. You can also get 8 extra games to form a 16-game bundle for US$3.98, but there doesn't seem to be many big titles in it.
$1.99 Bundle
Super 3-D Noah's Ark
POSTAL 2
Lovely Planet
Alien Rage - Unlimited
Sniper: Ghost Warrior 2
Nam
Depth Hunter 2: Deep Dive
NecroVisioN + NecroVisioN: Lost Company
$3.98 Bundle - includes all games in $1.99 bundle + below games
Betrayer
System Shock 2
Fancy Skulls
Dead Effect
Zeno Clash
Xotic Complete Pack
Iron Grip: Warlord and Scorched Earth DLC
Dino D-Day
Zeno Clash - https://i.ytimg.com/vi/kM3JANuUOMM/maxresdefault.jpg