Tomb Raider: Underworld sales hit 1.5m

Eidos has estimated that 1.5 million copies of Tomb Raider: Underworld have been sold worldwide.

An impressive figure, but one that's lower than the company expected - and financial forecasts have been amended as a result.

"On a global basis our sell through to 31st December, which we estimate at approximately 1.5 million units, is below our internal forecasts, primarily due to a lower start in North America," Eidos said in a statement.

"In a difficult North American economy we have seen retailers restricting inventory levels and triple-A products being price discounted above our expectation."

Now Eidos reckons its full year revenues will be somewhere between GBP 160 million and GBP 180 million - around GBP 20 million less than previously thought.

Still, the firm is optimistic that Batman: Arkham Asylum will boost profits when it's released later this year for PC, PS3 and Xbox 360.