Just search for it in the apps store

Here's a list of some of the iPad games that's currently on sale. Thanks to Reventon

Dungeon Hunter 2 HD – Gameloft($9.99 -> $6.99)
Eternal Legacy HD – Gameloft($9.99 -> $6.99)
Assassin’s Creed-Altaïr’s Chronicles HD – Gameloft($9.99 -> $6.99)
Prince of Persia: Warrior Within HD-Gameloft ($6.99 → $.99)
Splinter Cell Conviction™ HD-Gameloft ($6.99→ $.99)
Let’s Golf! 2 HD – Gameloft($4.99 → $.99)
Zombie Infection HD – Gameloft($6.99 → $.99)
James Cameron’s Avatar for iPad – Gameloft($4.99 → $.99)
Time Geeks: Find All! HD($1.99 → $.99)
Fruit Ninja HD($4.99 → $.99)
Where’s Waldo?HD – in Hollywood($1.99 → $.99)
Where’s Waldo? HD -The Fantastic Journey($6.99 → $.99)
Hollywood Squares HD ($2.99 → $.99)
Family Feud Decades HD($3.99 → $.99)
The Price is Right HD($6.99 → $.99)
Family Feud HD($6.99 → $.99)
Deer Hunter: African Safari for iPad($4.99 → $.99)
Deer Hunter 3D for iPad – Glu($4.99 → $.99)
Family Guy Time Warped for iPad ($6.99 → $.99)
Skee-Ball HD ($1.99 -> $.99)
Words With Friends HD($2.99 -> $.99)
Defender Chronicles HD – Chillingo Ltd($4.99 -> $2.99)
CRYSTAL DEFENDERS for iPad – SQUARE ENIX Co., LTD.($7.99 -> $3.99)
CHAOS RINGS for iPad – SQUARE ENIX Co., LTD.($15.99 -> $7.99)