No joke -- several solid Xbox Live Arcade titles have been temporarily discounted, most by 50 percent, today through April 7. A few of the notable victims of this price slaughter include:

• Super Street Fighter II Turbo HD Remix ($7) -- 53% off
• Lumines LIVE ($5) -- 50% off
• South Park Let's Go Tower Defense Play! ($5) -- 50% off

Check out the full list of XBLA cost casualties after the break.