British publisher Eidos Interactive didn't quite reach the sales figures predicted by the company a while back. As it turns out, Tomb Raider: Underworld (released last year for the PC, Xbox 360, PS3 and Nintendo DS) has not sold as much as Eidos anticipated.

TR: Underworld sold an estimated 1.5 million units worldwide, albeit they've described the as sales disappointing. "On a global basis our sell through to 31 December, which we estimate at approximately 1.5 million units, is below our internal forecasts, primarily due to a lower start in North America," said Eidos.

Eidos lowered its full year revenue estimates to between GBP 160 million – GBP 180 million, compared to the previously estimated GBP 180 million – GBP 200 million.

Once news got out that Eidos is lowering revenue forecast, the publisher's stock plummeted by 25% after the markets opened this morning. As GI reports, "the company's stock closed last night at 17.25 pence but opened this morning at 12.25 pence following the statement that revenues would be around GBP 20 million lower than expected."