However still, that's planned to be changed as the mobile version will end service on Monday, Ap. However, all updates to Metal Slug Defense have stopped since late 2015, though this doesn't mean the game services have been discontinued as its still playable to this day, either offline or online. As it is a free-to-play game, there are elements such as layers of level grinding, missions costing credits that recharge over time and most of the unlockable characters only being available through a secondary currency more accessible for those willing to spend money on it. The game can be played online with friends or random people. The many different human, machine and monster units have a basic attack, as well as unique charged moves which sometimes require good timing to be used correctly. Players spend a constantly filling meter on various characters and enemies from the series, which then march forward in hopes of overwhelming and destroying the opposite base. Despite the title, it is not quite a Tower Defense, but rather a strategy game set in the Metal Slug universe. Metal Slug Defense is a mobile game released rather suddenly by SNK in 2014.
