The Bassoon King is fiction.
Orcs Must Die !. Unchained is the third installment in the Orcs Must Die !. franchise from Robot Entertainment , available for Microsoft Windows and PlayStation 4 .. Robot Entertainment. Robot Entertainment. Microsoft Windows. Microsoft Windows. PlayStation 4. PlayStation 4. Unchained was initially released as a beta version in 2014 , and in its release form on April 18 , 2017 .. As with the previous titles , Unchained is a variation on tower defense games , where the player places traps within the game 's levels and engages in direct combat with a selected hero characters to ward off several waves of orcs and other monsters from reaching a magic core .. tower defense. tower defense. While the game was available to purchase during its beta period , Unchained was released as a free-to-play title with a meta-game for players to earn in-game currency and upgrades through successful matches to improve traps and acquire other items and attributes to support their character , or which they can buy directly using real world money .. free-to-play. free-to-play. The game includes co-operative matches for up to three players against AI opponents , and a competitive mode between two teams of three , competing on separate instances of the map but with the ability to affect the other team 's performance ; the game previously featured a competitive , 5v5 player-versus-player mode named Siege that was dropped during the beta phase .. Artificial intelligence