Microsoft announced the latest titles that have joined the Xbox 360 Platinum Hits collection, now available at prices starting at $19.99:

• Grand Theft Auto IV
• Street Fighter IV
• Left 4 Dead
• Saints Row 2
• Star Wars: The Force Unleashed

Retailers are offering a “Buy 2 –Get 1 Free” promotion for Xbox Platinum Hits Collection titles, including the latest additions, through October 2009.