Modular Combat is a Half-Life 2 mod that introduces role-playing game (RPG) elements into the gameplay of the first-person shooter. The mod was released in 2008 and is set in the Half-Life 2 universe.

In Modular Combat, players can create a custom character with a unique set of skills and abilities. As they progress through the game, they earn experience points that can be used to improve their skills and unlock new abilities. The mod features a variety of game modes, including Deathmatch, Capture the Flag, and Team Deathmatch.

One of the unique features of Modular Combat is the use of modules, which are special items that can be equipped to enhance a player's abilities. There are a variety of modules available, including offensive, defensive, and utility modules. These modules can be found throughout the game world or purchased with in-game currency.

The mod also introduces a leveling system, where players can earn experience points by killing enemies, completing objectives, and achieving other in-game accomplishments. As players level up, they gain access to new abilities and can improve their existing skills.

Modular Combat can be played both online with other players or offline with bots. It offers a unique twist on the traditional Half-Life 2 gameplay by introducing RPG elements and customization options.