Age of Chivalry is a multiplayer-focused total conversion modification for Valve's Half-Life 2 using the Source engine.

Founded by Rickard Drakborn, Jeff Simmons and Scott Chipman, and developed by a group of independent developers called Team Chivalry, the mod features a medieval theme and aims to provide enjoyable close-combat battles.

[1] Players select to play on either the Agatha Knights or the Mason Order, the two factions competing to rule the fictional kingdom that is the game's setting.

Objectives vary from taking a strategical point to killing villagers, and include many siege-oriented ones like ramming down the main door of a castle and constructing bridges.

[1] PC Gamer highlighted the mod's large maps, describing the mountainous stretches as "tactics-encouraging" and overall should "encourage improvisation in team play.