Porting Goldsrc maps to Source

Before you start #

Porting maps from Goldsrc to Source is not easy. Depending on the complexity of the map, be prepared to invest anywhere from 3 to 50+ hours into a single port. Prior experience with Valve’s Hammer Editor is helpful, however porting maps is entirely doable without ever having used Hammer before.

This guide was primarily written in July of 2025. There is a small number of people who occasionally work on tools for the GoldSrc porting process, so depending on when you are reading this there may be some new ways to make the process easier. Search the web or ask in the Momentum Mod discord and you might find something useful.

sv_airdecelerate

Like sv_airaccelerate, but for air slowdown only (+back).

Default value is the same as the mode’s default sv_airaccelerate value in all gamemodes except for Conc, where it is set to 10

trigger_stick_explosive

A trigger volume that can stick explosives to or inside of its area.

Keyvalues #

Method of explosive stick (mode<choices>)

Explosive sticking behavior.

• 0: Stick on collision inside this area
• 1: Stick on entering this area

Defaults to 0.

Input #

Stick(void)

Sticks all explosives in this area.

Unstick(void)

Unsticks all explosives in this area.

Explode(void)

Explodes all explosives in this area.

Fizzle(void)

Fizzles all explosives in this area.