GMOD Saving Doctor Kleiner Campaign Download Garrysmod

Step back into the HEV suit and get ready for a new mission with the Saving Doctor Kleiner custom campaign for GMOD. This addon adds a unique, story-driven singleplayer map where you must fight through Combine forces to rescue Dr. Kleiner and his pet headcrab, Lamarr. If you’re looking for a classic Garrysmod Half-Life 2 adventure, this is a must-play.

Download Saving Doctor Kleiner for GMOD & Garrysmod

This button will take you to the official mod page on the Steam Workshop. The download is 100% safe, managed by Valve, and free of viruses. You just have to click the green “Subscribe” button on the Steam page, and the addon will be installed automatically in your Garry’s Mod. If you need more details, check out our complete installation guide.

What is the Saving Doctor Kleiner Campaign in GMOD?

The Saving Doctor Kleiner addon adds a new singleplayer map (tt12_savingkleiner) to your Garrysmod map list. Unlike a typical sandbox level, this is a complete, linear mission with a clear objective. Inspired by the classic Half-Life 2 gameplay loop, you will navigate enemy-filled territory, solve minor environmental puzzles, and engage in firefights with Combine soldiers, all in an effort to reach and rescue the captured Dr. Kleiner. It’s a short but well-crafted adventure perfect for fans of the original game.

Saving Doctor Kleiner GMOD & Garrysmod Showcase

Required Content

To ensure all textures, models, and sounds load correctly, you must own Half-Life 2 and have it mounted in your Garry’s Mod game.

Important Stability Disclaimer

The addon uploader notes that this custom campaign has only been tested in singleplayer sandbox mode. Using complex addons, especially those that alter NPC AI (like custom Combine soldier behaviors), or playing in multiplayer may cause crashes or other bugs. For the best experience, it is highly recommended to play with a minimal addon list.