When you have more time to talk about games, than actually play them.
There are so many games in the medieval era that involve siege warfare as part of the story. With so many castles in the hands of the people in power, it’s almost impossible to force your way through in a day. Those strong walls require armies to surround castles, cutting off essential supplies, while they build towers and catapults to get over or break thru walls.
Kingdome Come Deliverance’s whole conclusion of the story involves a siege of a castle and the activities that go with prepping for the final battle. You find weaknesses in the wall and build a catapult to exploit the weakness. Getting inside can require a battering ram and scaling walls with ladders or towers.
For the people under siege, the walls provide protection, but being cut off from supplies can lead to starvation. This leads to some desperate people on the inside. Archers have the advantage of the high ground on the top of the walls, but the towers and ladders can even the score.
Modern games like Rainbow Six Siege bring the concept into the current era. Instead of a castle, a special team like SWAT need to plan on getting inside a fortified house with terrorists using hostages as reinforcement to their walls.
In the game, catapults are replaced with explosives and stone walls are replaced by boarded windows with hostages in tow. Instead of to siege towers there are grappling hooks and ladders are replaced by rappelling. Arrows and swords are replace by firearms.