Last Line Of Defense is an excellent action and defense hybrid game. It may be called a new form or reform of defense games.
Cities collapse into chaos as the Ravager virus mutates all infected into bloodthirsty Ravagers. You and a handful of others form the Last Line of Defense, pooling your remaining stockpile of weapons, special ammo, bunker defenses, and superweapons to fend off the onslaught. Survive 25 waves of Ravager hordes and keep your bunker from falling. If your bunker falls, the Line falls. If the Line falls, humanity falls. (Rated 13+: Blood, Violence)