Mount & Blade II: Bannerlord is a strategy/action role-playing game. The fundamental gameplay premise is the same as previous entries in the series: the player builds up a party of soldiers and performs quests on an overhead campaign map, with battles being played out on battlefields that allow the player to personally engage in combat alongside their troops. Bannerlord, however, includes significant improvements to numerous elements of gameplay.
Sieges in Bannerlord are intended to be more strategic than they were in Warband. The player may construct a variety of different siege engines and strategically position them before the battle begins in order to target certain sections of the enemy fortifications. On the overhead campaign map, the player can choose to bombard the walls, possibly creating breaches that can be used once the battle begins. To discourage prolonged bombardments on the battle map, only the merlons, gatehouses, and siege engines will be destructible during the actual battle. The design of the defending castles and cities is intended to be biased in favor of the defenders; for example, murder holes are often located at key chokepoints, allowing the defenders to slaughter large numbers of the attackers before they can breach the gates.
Bannerlord will feature numerous improvements to the relationships between characters. The player will be able to use a more advanced dialogue system to try to persuade non-player characters to do things that they want. While conversing with a character, the player will need to fill up a progress bar by successfully pushing their arguments; if the bar is filled, the character will give in to the player. If the character does not give in to charm alone, the player can employ the game’s bartering system to try to bribe the character; this system is also used for regular transactions between the player and merchants. If the player repeatedly fails to persuade the character, a deal may become impossible and the relationship between them may be negatively affected. The persuasion system can also be used to court and marry characters. While Warband allowed characters to marry, the player may also have children with their spouse in Bannerlord. If the player character dies, one of their children can inherit their soldiers and fiefs and become the new player character.