Global Defence Force Tactics (THE地球防衛軍タクティクス) is a PlayStation 2 turn-based strategy game developed by thinkArts.
Known variously as: Earth Defense Force Tactics (US), Simple 2000 Series Vol. 103: The Chikyuu Boueigun Tactics (JPN), and Global Defense Force Tactics (EU).
Players assume the role of GDF Commander and control GDF units in turn-based missions against the giant bug menace. Missions take place on 2D hex-maps, with attacks depicted by brief animated cutscenes.
The game has 50 stages and 250 different weapons.
Source: Wikipedia, "Global Defence Force Tactics", available under the CC-BY-SA License.