If you've been wanting to try out Star Trek Online or would like to buy it for someone as a present, now's your chance to grab it for 50% off. For the second installment of its ongoing Publisher's Week promotion, Direct2Drive is offering sales on Atari games all week. The current Star Trek Online deal is good for today only, so act fast if you want to purchase the MMO for only $9.95!

If you're curious about the rest of the Atari deals this week, you can check out what other games will be going on sale after the jump.

• MONDAY: Star Trek Online - Explore strange new worlds. Seek out new life and new civilizations. Boldly go where no one has gone before for 50% off
• TUESDAY: Test Drive Unlimited - Race across more than 1000 miles of Hawaiian highways for 50% off
• WEDNESDAY: Haunted House - Cautiously creep through Atari's classic hair-raiser reimagined for 75% off
• THURSDAY: King's Bounty: The Legend - Take to the tactical battlefield with your chosen warrior and massive army for 75 % off
• FRIDAY: The Chronicles of Riddick: Assault on Dark Athena - Enter the sci-fi dystopia of the Riddick saga in this stealth, FPS hybrid for 75% off