Hidden Path Entertainment has announced development of Defense Grid 2 is currently underway, with a targeted launch on Steam for PC, Mac and Linux in the first half of 2014.

When the Defense Grid 2 Kickstarter campaign launched, the team at Hidden Path Entertainment didn't know exactly if they'd be able to produce a sequel. The campaign had a goal of $250,000, which was met, but the team was really looking for $1 million to fund a full sequel. Hidden Path fell short of that goal but thanks to an angel investor, the sequel is now under way.

The $250,000 goal of the Defense Grid 2 Kickstarter campaign was to fund Defense Grid: Containment, an expansion pack to the original Defense Grid: The Awakening. Hidden Path shipped the expansion earlier this year, which caught the eye of the unknown investor who secured funding for Defense Grid 2.

"You guys supported us, an investor saw your support, saw us make promises to you, saw us keep those promises to you and, after Containment shipped, they decided to partner with us and invest in Defense Grid 2 so that we have enough money to make the game," CEO Jeff Pobst says. COO Jim Garbarini added that Defense Grid 2 is "fully funded and moving forward." Kickstarter backers will receive a free copy of Defense Grid 2 when it ships, the duo confirmed.

Defense Grid: The Awakening is a tower-defense game that made its debut in 2008 on the PC and was ported to the Xbox 360 the following year. In the game, players must defend military bases from waves of encroaching alien enemies through strategic placement of defense towers.