If your trigger finger is itching for some aliens, don’t despair if you didn’t land a copy of “Halo 2” last week. Re-enforcements have arrived and more are on the way.

The Army and Air Force Exchange Service sold all 25,000 of its copies of the space marines-vs.-aliens game for Microsoft’s Xbox, exchange spokesman Judd Anstey said Monday. However, 6,000 more copies were due in stores worldwide Monday and another 10,000 are scheduled to arrive next Monday, he said.

The AAFES sales were just a small part of last week’s “Halo 2” invasion. The highly anticipated game saw a phenomenal $125 million in sales its first 24 hours of availability, The Associated Press reported.

The original “Halo” was a very popular first-person shooter, creating a ready market for the follow-up version.

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