While the market is flooded with a horde of zombie survival games (yes, pun intended), Zombie HQ manages to stand out from the rest. It does so in a few ways: a unique take on the "cozy catastrophe" brand of apocalyptica, a good third-person shooter against the raging undead (well, maybe "raging" is too much), and superior graphics and audio, particularly for a tablet game. The game offers a wide variety of customization options, both for your player character and your headquarters, a variety of missions to undertake, and a fairly generous reward table for achieving goals. It's also worth noting that unlike most freemium games, Zombie HQ can be played completely without the use of purchased add-ins. (The reviewer who called the app less a game and more a "business model" wasn't paying attention; the IAPs are necessary only for the terminally impatient.) Frankly, of the various freemiums I've played, this is the one that makes the least of trying to encourage the player to buy. Even the in-game "super-currency" can be earned through play, unlike the gems of crystals of other games, putting every in-game item within reach without spending a dime. With the number of upgrades to weapons, equipment, combatwear, and headquarters, this is a game that doesn't really get old. The only shortcoming, and the fault that took a point off the score, is the inclusion of the deservedly-reviled energy system. Each mission requires a certain amount of energy to undertake, and insufficient energy means waiting. It naturally recharges one point every five minutes, but with the smallest mission costing three, players wanting to just play and enjoy will end up frustrated. Even so, this game is well-worth your time if you're big on the zombie **** even just passingly enjoy it.