THQ Inc. shares slid more than 11 percent Monday after the video game developer lowered guidance for its fiscal first quarter because of weak sales for one of its games.

The Agoura Hills company said that sales of its “UFC Undisputed 2010” have been slower than expected, and analysts expect the company will run promotions to move the more than 2.6 million copies shipped so far.

THQ now expects a first-quarter loss per share of between 20 cents to 30 cents, compared with a previous outlook of breakeven. The company now expects net sales of between $155 million to $165 million, compared with an earlier range of $190 million to $200 million.

Analysts surveyed by Thomson Reuters on average were expecting the company to report profit of 1 cent per share on revenues of $203 million.

“While we are disappointed with this financial update, we continue to execute on our plan of bringing quality games to market,” Chief Executive Brian Farrell said in a statement, noting that stronger dollar overseas also will hurt the quarter’s results.

Shares closed down 64 cents, or 11.5 percent, to $4.91 on the Nasdaq.