In Multiplayer, be in a match with a developer.

Phoenix Party

First blood

Over and over

Just like the old days

Moderately experienced

Yeah, I'm pretty good

The adrenaline-fueled HLDM overhaul you’ve been waiting for. Packed with dynamic modes, extra weapons, refined classic maps, and advanced movement, it’s a fast, customizable, ever-evolving shooter for veterans and newcomers alike.

<h1>SEASON 9: WHITE SANDS</h1><p><p class="bb_paragraph" style="text-align: center"><i><strong>Season 9: White Sands</strong></i> 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<strong> One In the Chamber</strong> gamemode, a soundtrack system with more music to come, and new maps. Additionally, we have brought back as a playermodel,<strong> Adrian Soares - the ex-protagonist from our first ever title in 2017.</strong></p></p><br><h1>Steam Workshop</h1><p><p class="bb_paragraph" style="text-align: center">Make your dreams come true with the Cross Product Workshop. Create, share, and download maps, gamemodes, playermodels, sounds, and more.</p></p><br><h1>About the Game</h1><h2 class="bb_tag" >THE MULTIPLAYER OVERHAUL<i> HALF-LIFE</i> NEEDED</h2><p class="bb_paragraph" >Welcome to the chaos of<i> Cross Product Multiplayer</i> (ZAMNHLMP); a fast-paced multiplayer which blends familiar mechanics from<i> Half-Life</i> with new challenges and advantages, with more and more coming each year with our<strong> annual season updates.</strong> Based on open-source technologies, ZAMNHLMP is welcoming for familiars and casual players alike.</p><h2 class="bb_tag" >DYNAMIC GAMEMODES</h2><p class="bb_paragraph" >Choose from a variety of gamemodes to keep every match fresh and engaging. Play<strong> Capture the Flag, Domination, Snipers, Arcade, or Arena!</strong></p><h2 class="bb_tag" ><i>OPPOSING FORCE</i> WEAPONS</h2><p class="bb_paragraph" >Slash your enemies more diversely with the Displacer, M249 SAW, or the Sniper Rifle!</p><h2 class="bb_tag" >EXPANSIVE &amp; EXCLUSIVE MAP SELECTION</h2><p class="bb_paragraph" >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<i> Half-Life 1</i> and<i> Opposing Force</i> multiplayer maps can be found here, alongside a selection of community classics.</p><h2 class="bb_tag" >ADVANCED MOVEMENT MECHANICS</h2><p class="bb_paragraph" >Master bunny-hopping if you dare - you might just need it to save your life.</p><h2 class="bb_tag" >EXTENSIVE CUSTOMIZATION</h2><p class="bb_paragraph" >Fine-tune your experience with adjustable settings, such as field of view, weapon viewmodel offsets, and much more.</p><h2 class="bb_tag" >COMPETITIVE GAMEPLAY</h2><p class="bb_paragraph" >Inspired by classic<strong><i> Half-Life Deathmatch</i></strong> and arena-shooter culture from 1998-2002, with enhancements suited for adrenaline-pumping fights.</p><h2 class="bb_tag" >CREATE YOUR OWN GAMEMODE</h2><p class="bb_paragraph" >With our in-depth Gamemode &amp; Item Cache System, create your own gamemode based on any of the built-in gametypes.</p><h2 class="bb_tag" >STEAM CLOUD SUPPORT</h2><p class="bb_paragraph" >On a different computer? Need to reinstall the game? No matter, for<i> Steam Cloud</i> will automatically sync across all of your machines your <strong>CTF&amp;DOM definition files, recorded demos, gamemodes, and settings.</strong></p><h2 class="bb_tag" >CONSTANTLY EVOLING, YEAR BY YEAR</h2><p class="bb_paragraph" >Originally conceived as &quot;creaTive Deathmatch&quot; in 2019, the project evolved into &quot;Shooter Tourneys&quot; and ultimately &quot;Codename ZAMNHLMP,&quot; furthermore known as<i> Cross Product Multiplayer.</i> 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.</p><h2 class="bb_tag" >THE BACKBONE TO A DEFINITIVE EXPERIENCE</h2><p class="bb_paragraph" >For years, ZAMNHLMP has served as the experimentation playground for<i> Half-Life: Cross Product,</i> 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.</p><p class="bb_paragraph" ></p>

Good Game Database

Half-Life: Cross Product Multiplayer Achievements

Phoenix Party

First blood

Over and over

Just like the old days

Moderately experienced

Yeah, I'm pretty good