Attacking after death: The unit will attempt one last attack after its HP drops to 0.Some units exist solely for this purpose ( Hopper Mecha, Zombie(Rebel Soldier), Mutated Soldier) while others can attack normally and self-destruct with their special attacks ( Cat Slug, Samurai Infantry(Red)). Self-destruction: The unit can destroy itself to deal damage and not award any AP to the opponent.Transformation: The unit changes its properties when its special is used ( Nadia, Slug Trolley, etc.), or when its HP drops below a certain value (Allen O'Neil Jr., Big John, etc.).Crab Nest, The Snail House) while others turn into a different unit upon destruction ( Emain Macha, Forklift, Protogunner). Some units are solely for generating (e.g. Summoning: The unit can Generate new Units.Examples of Light air units that can be run over when they dip include Mini U.F.O and Huge Locust, while examples of Heavy air units that can block Metal Slug Attacks are Dai-Manji, Sol Dae Rokker, and Slug Flyer. These units do actually have resistance values but most are impossible to hit with Metal Slug Attacks, with the exceptions of certain large air bosses and air units that dip during their attacks. Air Units: Units that fly very high to evade nearly all ground attacks, and cannot be knocked back.Examples include Iron Nokana, Augensterm, Mars Mecha and Smasher. This may work against them as some multi-hitting attacks will hit them more than they would a Heavy unit. Tank Units: Units with high HP that do not get knocked backВ when they are hit.В They can stop a Metal Slug Attack without being knocked back.The actual resistance to knockback varies among this group: units like Vanguard and Di-Cokka will get knocked back by any attack that has the power to do so, while units like Brian Battler and Allen O'Neil(Wrath) resist knockback until their HP drops below a certain percentage. Heavy Units:These units will take a Metal Slug Attack and stop it, and can be knocked back by attacks.Cat Mini UFO is a special case, as it cannot be knocked back and is a ground unit, but is run over by Metal Slug Attacks. Examples of units that cost more AP but can be run over include Christmas Eri/Fio, Clone Fio(Zombie), Robert and King. Nearly all groundunits that cost under 100 AP are in this category. Some of these units can actually survive the damage blast of the Metal Slug Attack but not the attack itself, such as Christmas Fio. Light Units:В These units can be knocked back by attacks and will be run over by Metal Slug Attacks.Single: Units that can harm only one unit at a time with its attack.Spread: Units that can harm units over an area of effect.If the player sorts the units in their respected faction, all unit in the slot will receive a 10% HP bonus. Units can be sorted by their characteristics and the type of unit they are. For some KOF Units, they can be bought in bundles of three with real money.Certain updates do not involve the EVENT tab but instead open special stages on the world map that are involved in unlocking new units (e.g.The unlocking criteria varies depending on the event. Most events are accessible under the EVENT tab in Sortie mode. Some units are only available in events that are exclusive to specific updates.Twelve units are unlocked by saving all the POWs in the Emergency stages, which appear on the main map in sortie mode at specific times of the day (12:00 nn 6:00pm, 10:00 pm).Seven units are unlocked by rescuing the POWs in the daily boss area (in the Alternate World) which changes according to the day of the week.Some are unlocked after completing an area, some are unlocked after rescuing all POWs in an area, and some are unlocked in the shop after completing an area or world. Some units are unlocked upon completing tasks in the Sortie missions.There are occasional sales in some updates where the units that cost 200+ Medals can be bought at half price. Many units can be bought from the shop for a certain number of medals.

Metal slug attack wiki