Zombie Killer Squad is a free Android action game developed by Section Studios Inc. and 3BD Games LLC. The game has undergone major updates, including new characters, new weapons, and a new achievement system. With the 2.0 version, players can join Luke, SeaNanners, Syndicate, iHasCupQuake, and TmarTn on their journey to survive a zombie apocalypse.

The game features two new characters, TmarTn and Cupquake, and all characters have specific advantages. There are three new weapons, including El Laser, Noob Tube, and Yotslazer, and weapons are now upgradable. In addition, there are six new accessories for head, torso, and legs. The game has a new HUD meter showing zombie multiplier, and players can level up their rank and unlock accessories and weapons by completing objectives. The game has had major and minor bug fixes, and a fix for weapon upgrade bugs and badge rank up bugs in the 2.2 version.

Overall, Zombie Killer Squad is an exciting and action-packed game that will definitely blow your mind. It is a must-play for those who love action games and zombie apocalypse themes.