Gabe Mod + (Plus) is the newest addition to the Gabe Mod series, built on the Orange Box Multiplayer branch of Source. While currently in beta development, actual Lua and a sandbox building experience are planned for the future.
Links:
Get Development Beta 2 of Gabe Mod +
Get version 0.6 (Singleplayer)
Download the source code (Singleplayer 0.6):
Version 0.5:
Changing the colors of objects with the
Color Tool.
Painting bullet holes with the
Decal Tool.
Freezing/Unfreezing props with the
Physics Gun.
Clean up the world with
Hopwire Vortex Grenades.
Version 0.6:
Weld, Rope, and Ballsocket objects together with the
Constraint Tool.
Change the Physics Gun beam color with
Commands
or the
Preset Menu.
Select props from a list and launch them with the
Rocket Launcher.
Development Beta 1 (Version 0.7):
Funny Grenade launcher on SMG1