# Zombie Panic! Source server hosting for survivors and zombies > Host a Zombie Panic! Source server with 24 slots or more: Survival, Objective and Hardcore modes, Workshop maps, the built-in admin system and SourceMod. Shooter · Horror Run a Zombie Panic! Source server where survivors hold out and the dead keep coming. The free dedicated server runs Survival, Objective and Hardcore with Workshop maps, ZPS’s own admin system and SourceMod. - Free dedicated server for Windows and Linux - Survival, Objective and Hardcore modes - Workshop maps mounted from addonlist.txt - Built-in admin system, SourceMod and AngelScript See plans Find your size Slots Set with -maxplayers. The developers do not lock servers to 24, and several community servers run up to 32. 24 by default, more allowed\ Ports The Source engine defaults: 27015 for game, queries and RCON, 27020 for SourceTV. 27015 UDP/TCP · 27020 UDP\ Server SteamCMD app 17505, anonymous\ Version 3.3 (October 2025)\ Admin ZPS admin system · SourceMod\ Scripting AngelScript Game modes - Survival - Objective - Hardcore - Steam Workshop - SourceMod - AngelScript Game facts from the Zombie Panic! Source team’s update notes, the Steam store and the Valve Developer Community, checked in October 2026. - DDoS protection - 20 game server locations ## Zombie Panic! Source plans are being prepared Tell us your slot count, modes and plugins, and our team will reply with the options. Or open a ticket and we will let you know when the plans are online. [Contact sales](https://hyperdc.com/contact-us) [Open a ticket](https://hyperdc.com/support/new-ticket) ## How big should a ZPS server be? Zombie Panic! Source is a light Source server; slots and plugins decide the load. | Feature | **Small** Up to 12 slots | Recommended **Standard** Up to 24 slots | **Large** Up to 32 slots | | --- | --- | --- | --- | | Memory (RAM)Memory for the map, the players, bots and every plugin. | 1 GB | 2 GB | 3 GB | | CPU coresThe server simulates every tick on its main thread, so fast cores matter most. | 1 | 2 | 2 | | Disk spaceThe game takes about 5 GB; leave room for Workshop maps, custom content and logs. | 10 GB | 15 GB | 15 GB | | Game modeObjective maps run scripted events; Hardcore adds tougher rules on the same maps. | Survival | Survival and Objective | All modes and plugins | | Typical use | Friends and small rounds | A standard 24-slot community server | A busy server with plugins | - ### Small Up to 12 slots Memory (RAM)Memory for the map, the players, bots and every plugin. 1 GB\ CPU coresThe server simulates every tick on its main thread, so fast cores matter most. 1\ Disk spaceThe game takes about 5 GB; leave room for Workshop maps, custom content and logs. 10 GB\ Game modeObjective maps run scripted events; Hardcore adds tougher rules on the same maps. Survival\ Typical use Friends and small rounds - Recommended ### Standard Up to 24 slots Memory (RAM)Memory for the map, the players, bots and every plugin. 2 GB\ CPU coresThe server simulates every tick on its main thread, so fast cores matter most. 2\ Disk spaceThe game takes about 5 GB; leave room for Workshop maps, custom content and logs. 15 GB\ Game modeObjective maps run scripted events; Hardcore adds tougher rules on the same maps. Survival and Objective\ Typical use A standard 24-slot community server - ### Large Up to 32 slots Memory (RAM)Memory for the map, the players, bots and every plugin. 3 GB\ CPU coresThe server simulates every tick on its main thread, so fast cores matter most. 2\ Disk spaceThe game takes about 5 GB; leave room for Workshop maps, custom content and logs. 15 GB\ Game modeObjective maps run scripted events; Hardcore adds tougher rules on the same maps. All modes and plugins\ Typical use A busy server with plugins The ZPS team publishes no server hardware figures; these are starting points for a Source server. Plugins and bots add load. ## Modes, maps and admin tools What a Zombie Panic! Source server brings, and where each part is configured. ### Three modes Survival, Objective and Hardcore, switched with the maps you run and settings such as sv\_zps\_hardcore. ### Workshop maps List Workshop items in addons/addonlist.txt; players download only the map currently running. ### Built-in admin system zps/data/adminsystem.json holds admins, bans and warnings. ZPS does not read SourceMod’s admin lists, so add admins to both. ### SourceMod Supported with game data for each ZPS version, for admin menus and community plugins. ### AngelScript The official scripting API, loaded from default\_plugins.json. Some script features mark the server as Custom. ### Custom content Non-Workshop content goes into zps/custom. Back up your JSON config files before updates, since SteamCMD can overwrite them. ## Set up your ZPS server Four steps to the first panic. 1. ### Pick slots and modes 24 slots suit most servers; choose the size with the table above. 2. ### Pick a location Choose the one closest to your players from our 20 game server locations; ping matters in a shooter. 3. ### Set admins and maps Add admins to adminsystem.json, write your rules in server.cfg and list Workshop maps in addonlist.txt. 4. ### Invite your players Players find the server in the server browser or connect from the console with the address. ## Other game servers you might like ### Left 4 Dead 2 Co-op campaigns and 4v4 Versus with custom VPKs and SourceMod. ### No More Room in Hell Co-op zombie survival for eight, with SourceMod. ### Team Fortress 2 Every TF2 mode with Workshop maps and SourceMod. [Learn more](https://hyperdc.com/game-servers/team-fortress-2) ### Counter-Strike: Source Surf, bhop, zombie or 5v5 with SourceMod and FastDL. ### Garry’s Mod Sandbox, TTT, DarkRP or Prop Hunt with Workshop content. ### Sven Co-op Co-op maps for up to 32 players, with plugins and map votes. [Learn more](https://hyperdc.com/game-servers/sven-co-op) ## Frequently asked questions Still have a question? Send us a message and our team will reply by email. [Contact us](https://hyperdc.com/contact-us) [Open a ticket](https://hyperdc.com/support/new-ticket) ### How many players can join a ZPS server? The default is 24 slots, set with -maxplayers. The developers do not lock servers to 24, and several community servers run up to 32. ### Which ports does the server use? The Source engine defaults: UDP 27015 for the game and queries, TCP 27015 for RCON and UDP 27020 for SourceTV. ### How is the server installed? With SteamCMD as app 17505 and an anonymous login, on Windows or Linux, started with -game zps. On Linux, the -linux-extra-bins option uses the OpenSSL that ships with the server. ### How do I add admins? Add them to ZPS’s own admin system in zps/data/adminsystem.json. If you also run SourceMod, add them there as well, because ZPS does not read SourceMod’s admin lists. ### How do I add Workshop maps? List the Workshop items in zps/addons/addonlist.txt and the server mounts them. Players download only the map that is running when they join. ### Where does custom content go? Into zps/custom. Back up your JSON config files before an update, because SteamCMD can overwrite them. ### Can I use SourceMod and AngelScript? Yes. SourceMod is supported with game data for each version. AngelScript is the official scripting API and loads plugins from default\_plugins.json; some script features mark the server as Custom. ### Which game modes are there? Survival, Objective and Hardcore. Hardcore is switched on with sv\_zps\_hardcore, and AngelScript or SourceMod can add custom modes. ### How do I make map downloads reliable? Use sv\_downloadurl with a web server that holds your maps. The developers suggest keeping maps uncompressed to avoid download problems. ### Is a 64-bit server coming? The team announced in December 2025 that it is moving ZPS to the TF2 SDK branch, which brings 64-bit builds. It has no release date yet; today’s server is 32-bit. ## Ready to hold out against the horde? Tell us your slot count, modes and plugins, and we will help you pick the right Zombie Panic! Source server. See plans [Contact sales](https://hyperdc.com/contact-us) --- Source: \ Updated: 2026-10-09