SEASON 9: WHITE SANDS

Season 9: White Sands is the biggest Quality-of-Life Update ZAMNHLMP has ever received. With a plethora of bug fixes and enhancements we guarantee you'll have a much better experience than with any previous update, with new content such as the One In the Chamber gamemode, a soundtrack system with more music to come, and new maps. Additionally, we have brought back as a playermodel, Adrian Soares - the ex-protagonist from our first ever title in 2017.

Steam Workshop

Make your dreams come true with the Cross Product Workshop. Create, share, and download maps, gamemodes, playermodels, sounds, and more.

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THE MULTIPLAYER OVERHAUL HALF-LIFE NEEDED

Welcome to the chaos of Cross Product Multiplayer (ZAMNHLMP); a fast-paced multiplayer which blends familiar mechanics from Half-Life with new challenges and advantages, with more and more coming each year with our annual season updates. Based on open-source technologies, ZAMNHLMP is welcoming for familiars and casual players alike.

DYNAMIC GAMEMODES

Choose from a variety of gamemodes to keep every match fresh and engaging. Play Capture the Flag, Domination, Snipers, Arcade, or Arena!

OPPOSING FORCE WEAPONS

Slash your enemies more diversely with the Displacer, M249 SAW, or the Sniper Rifle!

EXPANSIVE & EXCLUSIVE MAP SELECTION

You can battle across the extensive collection of maps created and curated by ourselves, as well as iconic maps such as Crossfire, Datacore, and more, which have been refined and improved. All of the Half-Life 1 and Opposing Force multiplayer maps can be found here, alongside a selection of community classics.

ADVANCED MOVEMENT MECHANICS

Master bunny-hopping if you dare - you might just need it to save your life.

EXTENSIVE CUSTOMIZATION

Fine-tune your experience with adjustable settings, such as field of view, weapon viewmodel offsets, and much more.

COMPETITIVE GAMEPLAY

Inspired by classic Half-Life Deathmatch and arena-shooter culture from 1998-2002, with enhancements suited for adrenaline-pumping fights.

CREATE YOUR OWN GAMEMODE

With our in-depth Gamemode & Item Cache System, create your own gamemode based on any of the built-in gametypes.

STEAM CLOUD SUPPORT

On a different computer? Need to reinstall the game? No matter, for Steam Cloud will automatically sync across all of your machines your CTF&DOM definition files, recorded demos, gamemodes, and settings.

CONSTANTLY EVOLING, YEAR BY YEAR

Originally conceived as "creaTive Deathmatch" in 2019, the project evolved into "Shooter Tourneys" and ultimately "Codename ZAMNHLMP," furthermore known as Cross Product Multiplayer. Ever since 2021, we've been expanding and evolving this game with our annual yearly Season updates. We've built this game upon open-source technologies, and we've left the SDK open as a thank you to the GoldSource Developer Community, and so you can have a tinker around with it yourself.

THE BACKBONE TO A DEFINITIVE EXPERIENCE

For years, ZAMNHLMP has served as the experimentation playground for Half-Life: Cross Product, our upcoming flagship title with an awesome campaign. As new ways to play get tooled with internally, you'll get to try them out here.