Base Builder
Build a fortress, survive the horde. Base Builder is the classic Counter-Strike 1.6 zombie building mod - this is the NS edition (7.5-NS, based on Tirant's Base Builder 7.4) for AMX Mod X. Builders have two and a half minutes to move blocks into a base, then the zombies are released. The complete guide, from your first block to boss rounds.
Original mod by Tirant · NS edition by Néć[Ř]ø /A/
Quick Start
Builders (CT) build a base out of the map's blocks, then defend it with guns. Zombies (T) break in and infect them. Last team standing wins.
- Press M. The main menu has everything: zombie class, shop, weapons, unlocks, upgrades, role, party, colors, stats and voting.
- Builders: hold E on a block to grab it during the build phase. Move the mouse to carry it, scroll in and out with your aim, let go to drop it.
- Lock your blocks. Aim at a block and say
/lock(up to 10) so nobody else can move it. - Pick a role and a gun.
/rolefor a builder perk, and the weapon menu appears when the zombies are released. - Zombies: pick a class with
/classand use its ability with G or R. - Earn credits from kills, medals and challenges and spend them on
/shop,/unlockand/upgrade. Everything is saved.
This is version 7.5-NS, our own fork of Base Builder 7.4. It is installed on the server but still in testing - numbers on this page are the defaults and may change. See Dev Status.
What is Base Builder?
Base Builder is a classic zombie mod for Counter-Strike 1.6. Maps (bb_) are full of movable blocks behind a barrier. The builders turn those blocks into a base while the zombies wait; when the barrier drops, the zombies have to break in.
Builders (CT)
- Grab, move, lock and color blocks
- 4 roles: Engineer, Medic, Gunner, Scout
- Party up and share your blocks
- Repair damaged blocks by holding E
- 24 guns, most unlocked with credits
Zombies (T)
- 10 classes, each with an ability
- Break blocks (2,500 HP each)
- Infect builders - they join you
- Shop: Madness, +1000 HP, Speed
- Upgrades: health, speed, low gravity
How a Round Works
- Build phase - 150 sBuilders grab and place blocks. Zombies wait behind the barrier and pick a class.
- Prep phase - 30 sBlocks can no longer be moved. Builders pick a weapon and take position; everyone votes the best base.
- ReleaseThe barrier drops and the zombies attack. From now on blocks have health: zombies break them, builders repair them.
- InfectionA builder killed by a zombie comes back as a zombie after 5 s. Dead zombies respawn after 3 s.
- Last humanThe last builder alive gets +200 HP and 1.5× damage. Surviving the round pays 50 credits.
- Round endBuilders win if anyone survives the timer; zombies win when every builder is infected. MVPs are announced and paid.
Every 5th round can be a boss round.
Building
Hold E on a block to grab it. While you hold it, the block follows your aim; look closer or further to pull and push it.
| Action | How | Notes |
|---|---|---|
| Grab / move | hold E (or bind +grab) | Build phase only. Reach 32 - 768 units. |
| Lock / claim | /lock while aiming at a block | Up to 10 blocks (11 for Engineers). Only you and your party can move it. |
| Color | /colors, /random | Your blocks take your color. /mycolor shows it, /whois <color> finds the owner. |
| Repair | hold E on a damaged block | After release: +40 HP every 0.5 s (Engineers twice as fast). |
| Respawn | /respawn | Builders can respawn freely during the build phase - handy if you are stuck. |
After the zombies are released every block has 2,500 HP. Watch for cracks and keep an Engineer near the weak spots.
Builder Roles and Party
Say /role (or M → Role) to pick a perk. You can change it every round.
| Role | Perk |
|---|---|
| Engineer | +1 lock slot, repairs blocks twice as fast |
| Medic | Heals nearby builders 3 HP/s (up to 100 HP) |
| Gunner | +15% damage to zombies |
| Scout | Zombie radar on the HUD, lower gravity |
Party
Say /party to invite friends (up to 3). Party members share claimed blocks: you can move and unclaim each other's blocks and build one base together.
Weapons and Unlocks
When the zombies are released you choose a primary and a secondary weapon. The P228 and SG-552 are free; everything else is unlocked once, forever, with credits (/unlock).
| Weapon | Credits | Weapon | Credits |
|---|---|---|---|
| P228 Compact | free | SG-552 Commando | free |
| Fiveseven | 250 | Dual Elite Berettas | 500 |
| Ingram MAC-10 | 500 | Schmidt TMP | 500 |
| Schmidt Scout | 750 | USP .45 Tactical | 750 |
| Glock 18C | 750 | XM1014 | 1,000 |
| Steyr AUG A1 | 1,000 | MP5 Navy | 1,000 |
| Desert Eagle | 1,000 | Famas | 1,500 |
| AWP | 1,500 | ES P90 | 1,500 |
| UMP 45 | 2,000 | M3 Super 90 | 2,000 |
| IMI Galil | 2,500 | M4A1 Carbine | 10,000 |
| AK-47 | 15,000 | M249 Para | 25,000 |
| G3SG1 Auto-Sniper | 25,000 | SG-550 Auto-Sniper | 50,000 |
Builders' weapons are balanced for this mod: damage and fire rate are tuned per gun (for example the Deagle hits 3× harder).
Zombie Classes
Say /class (or M → Class). Four classes are free; six more are bought once with credits. VIPs own every class.
| Class | HP | Speed | Gravity | Ability (G / R) | Cost |
|---|---|---|---|---|---|
| Classic Zombie | 3,000 | 260 | 1.00 | Rage - +30% speed for 4 s (25 s) | free |
| Fast Zombie | 2,000 | 325 | 1.00 | Sprint - +50% speed for 2.5 s (20 s) | free |
| Jumper Zombie | 2,500 | 285 | 0.50 | Leap - jump forward (6 s) | free |
| Tanker Zombie | 4,000 | 210 | 1.00 | Fortify - take 50% damage for 4 s (25 s), 200 armor | free |
| Banshee | 2,250 | 260 | 0.85 | Scream - pushes and blinds nearby builders (25 s); walks through zombies | 500 |
| Charger | 3,500 | 210 | 0.85 | Charge - fast dash forward (8 s) | 750 |
| Rejuvinator | 2,500 | 270 | 0.80 | Mend - heal yourself 30%, nearby zombies 10% (20 s); regenerates | 750 |
| Werewolf | 3,000 | 275 | 0.75 | Howl - zombies nearby +20% speed for 5 s (30 s) | 1,000 |
| The Smasher | 1,500 | 260 | 1.00 | Smash - 400 damage to the block you aim at (15 s); no pain shock | 1,000 |
| Chainsaw | 3,000 | 245 | 0.85 | Rev - 3× block damage for 5 s (25 s); 2× damage | 1,500 |
Cooldowns in brackets. HP, speed and gravity also improve with upgrades.
Playing a Zombie
- During the build phase, scout the builders' base and pick the class that beats it - Smasher and Chainsaw for thick walls, Jumper and Banshee to get over or around.
- Abilities are on G (drop) and R (reload). Each class has one.
- Attack together: Werewolf's Howl and Rejuvinator's Mend help the whole horde.
- Dying costs you nothing: you respawn after 3 s and still earn 1 credit per death.
- Shop items for zombies: Madness (5 s invulnerable), +1000 HP and a Speed Boost.
Credits
Credits are the server currency, saved with your SteamID. Say /credits to see yours.
| You earn | Credits |
|---|---|
| Killing a zombie | 1 |
| Infecting a builder (as a zombie) | 10 |
| Dying as a zombie | 1 |
| Medals | 1 - 15 |
| Challenges | 25 - 1,000 |
| Round MVP | 15 |
| Best base vote | 25 |
| Surviving as last human | 50 |
| Killing the boss | 100 |
Spend them on the shop, weapon unlocks, zombie classes and upgrades. Set a savings goal with /setgoal <credits> and check it with /goal.
Shop
Say /shop or M → Shop. Paid with credits; most items once per round.
| Item | For | Price | Effect |
|---|---|---|---|
| Frost Grenade | Builders | 150 | Freezes zombies within 240 units for 3 s |
| Flare | Builders | 50 | Lights up the area for 30 s |
| Jetpack | Builders | 400 | Hold JUMP in the air to fly - this round, after the release |
| Extra Lock Slot | Builders | 100 | Lock one more block (build phase only) |
| +100 Armor | Builders | 75 | 100 more armor |
| +50 HP | Builders | 100 | 50 more health |
| Madness | Zombies | 200 | 5 s invulnerable |
| +1000 HP | Zombies | 150 | 1,000 more health |
| Speed Boost | Zombies | 100 | Faster for 10 s |
Upgrades
Say /upgrade. Upgrades are permanent and saved. Each has 25 levels; a level costs 100 + 100 × current level credits (100, 200, 300 ...).
| Upgrade | Effect |
|---|---|
| Zombie Health | More HP as a zombie |
| Zombie Speed | Faster as a zombie |
| Zombie Low Gravity | Higher jumps as a zombie |
| Builder Armor | Spawn with more armor as a builder |
Boss Rounds and Last Human
Boss round
- Every 5th round (4+ players)
- One zombie becomes the boss
- 6,000 HP + 1,500 per builder
- The builder who kills it gets 100 credits
Last human
- When one builder is left (4+ players)
- +200 HP and 1.5× damage
- Survive the round: 50 credits
Round MVP
At round end the best builder and best zombie are named MVP and get 15 credits each.
Medals
Medals pop up with a sound when you pull off something special. /medals shows yours, /medallist the full list.
| Medal | How | Credits |
|---|---|---|
| First Blood | First kill of the round | 2 |
| Multi-Kill | 2 kills in rapid succession | 5 |
| Mega-Kill | 3 kills in rapid succession | 7 |
| Ludacriss Kill | 4 kills in rapid succession | 9 |
| Wicked Sick | 5 kills in rapid succession | 11 |
| Butcher | Deal a devastating blow (150+ damage) | 15 |
| Cold Efficiency | Kill 2 zombies without reloading | 5 |
| Lucky Shot | Kill 2 invisible enemies in rapid succession | 5 |
| Suicidal | Kill yourself instead of letting a zombie get you | 1 |
| Headcase | Kill a human with a headshot | 5 |
| Holy Shit | Kill a zombie with a knife | 10 |
| Shotgun Madness | 5 kills in a row with a shotgun | 7 |
| Headhunter | 2 headshot kills in a row | 3 |
Challenges
Long-term goals that pay big, once. /challenges shows your progress, /challist the full list. There are also a daily and a weekly challenge: /daily.
| Challenge | Goal | Credits |
|---|---|---|
| Alpha and Omega | Take down 25,000 enemies | 1,000 |
| Zombie Genocidist | Eliminate 10,000 zombies | 500 |
| Hmm... Tasty | Eat the brains of 500 humans | 750 |
| Shoot to Kill | Headshot 1,337 zombies | 350 |
| Owned | Die 5,000 times as a zombie | 500 |
| One For The Team | Die 1,000 times as a human | 100 |
| Colorblind | Select a new color 250 times | 50 |
| Locked-up Tight | Lock and claim 250 blocks | 250 |
| Base Builder | Move 10,000 blocks | 250 |
| Fast Killer | First Blood 100 times | 200 |
| 1shot2kill | Multi-Kill 50 times | 350 |
| Drop of Blood | Mega-Kill 50 times | 500 |
| Pool of Blood | Ludacriss Kill 25 times | 750 |
| River of Blood | Wicked Sick 10 times | 1,000 |
| The Cleaver | Butcher 10 times | 250 |
| Ammo Conservative | Cold Efficiency 50 times | 450 |
| Heat Sensor | Lucky Shot 50 times | 250 |
| The Easy Way Out | Suicidal 25 times | 25 |
| The Guillotine | Headcase 10 times | 400 |
| Commando | Holy Shit 15 times | 500 |
| Dead Wreckening | Inflict 100,000 damage as a zombie | 750 |
| Every Bullet Counts | Inflict 1,000,000 damage as a human | 250 |
| Boomstick | Shotgun Madness 250 times | 500 |
| Pinpoint Precision | Headhunter 250 times | 500 |
| Challenge Hunter | Complete every other challenge | 250 |
Votes
| Vote | How it works |
|---|---|
| Rock the Vote | Say rtv. When 60% of players want it (from 3 minutes into the map), a 5-map vote starts. The map changes at round end. |
| Build time | Once per map (2nd round) everyone votes how long the build phase lasts. |
| Base rating | During the prep phase everyone votes the best base. The winner gets 25 credits (needs 3+ builders). |
Key Binds
The defaults work out of the box (E grab, G/R ability, M menu). Extra binds for your console:
All Commands
Chat commands start with a slash. Search or filter.
| Command | For | What it does |
|---|---|---|
M key / /menu | Everyone | Main menu - everything in one place |
/shop | Everyone | Open the shop |
/credits | Everyone | Your credits |
/unlock | Everyone | Unlock weapons |
/upgrade | Everyone | Buy upgrades |
/mystats | Everyone | Your stats |
/whostats <name> | Everyone | Another player's stats |
/top15 / /rank | Everyone | Leaderboard and your rank |
/medals / /medallist | Everyone | Your medals / all medals |
/challenges / /challist | Everyone | Your challenge progress / all challenges |
/daily | Everyone | Today's and this week's challenge |
/setgoal <n> / /goal | Everyone | Set and check a credits goal |
rtv / /rtv | Everyone | Rock the vote |
/stuck / /unstuck | Everyone | Stuck in a wall or block? Moves you to the nearest free spot (every 5 s) |
/fix | Everyone | Frozen with a stuck camera or no HUD? Resets your player state (every 5 s) |
/cmd / /commands | Everyone | Short command list in chat |
/lock / /claim | Builders | Lock the block you aim at |
/colors | Builders | Choose your block color |
/random | Builders | Random color |
/mycolor | Builders | Show your color |
/whois <color> | Builders | Who owns that color |
/role | Builders | Choose a builder role |
/party | Builders | Invite friends and share blocks |
/guns | Builders | Weapon menu |
/respawn | Builders | Respawn during the build phase |
/class | Zombies | Choose a zombie class |
G or R | Zombies | Use your class ability |
/grantbuild [s] | Admin | Builders may move blocks for a few more seconds |
/swap <name> | Admin | Move a player to the other team |
/swap2 <a> <b> | Admin | Swap two players |
/revive <name> | Admin | Revive a player |
bb_fixplayer <name> | Admin | Fix a frozen / stuck player (also in M → Admin) |
/ban <name> | Admin | Build-ban a griefer (can't move blocks) |
/releasezombies | Admin | End the build phase now |
bb_addcredits <name> <n> | Admin | Give credits (console, rcon flag) |
FAQ
Do I have to download anything?
No. Maps, zombie models and sounds download automatically and fast from our FastDL. You can also grab the map packs from the FastDL page before you join.
I can't move a block.
Blocks only move during the build phase, and not if someone else locked it (unless they are in your party). After the release you can only repair.
Is my progress saved?
Yes: credits, unlocked guns and classes, upgrades, medals and challenges are saved by your SteamID.
How do I use my zombie ability?
Press G (drop) or R (reload). The chat tells you when it is on cooldown.
I spawned inside a block / I am stuck.
Say /stuck. You are moved to the nearest free spot. The server also checks every spawn and frees anyone a block is dropped on.
I spawned frozen - the camera is stuck and there is no HUD.
Say /fix. It finishes your join, puts the camera back and resends the HUD. If that does not help, an admin can fix you from M → Admin.
Someone keeps wrecking our base.
Tell an admin: every block move is logged, and admins can build-ban griefers.
Why does M not open the team menu?
M opens the Base Builder menu. Teams are set by the mod: builders are CT, zombies are T.
Tips and Strategy
- Builders: build small and thick. A tight box with layered walls beats a big base with gaps.
- Lock your key blocks early - unlocked blocks can be moved by anyone during the build phase.
- Put an Engineer on repairs and a Medic in the middle; Gunners hold the entrance.
- Save a Frost Grenade for when the wall breaks.
- Zombies: attack one wall together - spreading out only helps the builders.
- Smasher and Chainsaw open walls; Jumper and Banshee get over and through.
- Spend early credits on upgrades: they last forever.
For Server Owners
Requires AMX Mod X 1.8.2 with fakemeta, hamsandwich, engine, fun, cstrike, csx and nvault. Plugins load from plugins-basebuilder.ini in this order: core first, class plugins right after.
| Plugin | Does |
|---|---|
| basebuilder65.amxx | Core: build/prep/release, blocks, lock, colors, teams, admin commands |
| bb_classes65.amxx | 4 free zombie classes + abilities |
| bb_classes74.amxx | 6 credit zombie classes + abilities |
| bb_credits74.amxx | Credits, unlocks, upgrades, medals, challenges, leaderboard |
| bb_weaponbalance.amxx | Weapon damage and fire rate (amx_dmg_* / amx_speed_*) |
| bb_shop.amxx | Shop |
| bb_rounds.amxx | Boss rounds, last human, MVP, daily/weekly, block log |
| bb_roles.amxx | Builder roles and party |
| bb_votes.amxx | Rock the vote, build-time vote, base rating |
| bb_menu.amxx | M main menu and admin menu |
c (kick): build ban, swap, revive, grant build time, admin menu · d (ban): release zombies · m: VIP - every zombie class free · l (rcon): give credits.
Dev Status
7.5-NS is our fork of Tirant's Base Builder 7.4. It is installed on the server and switched on for test sessions; the server name changes to [NS] Base Builder when it runs.
Fixed in 7.5-NS
- Credit upgrades now apply and are saved
- Credits load only after the SteamID is known
- Weapon unlocks no longer leak to the next player
- Saves every round end and map change
- Chainsaw 2× damage only for zombies
- Banshee semiclip rewritten (no lag)
- Challenges and medals pay reliably, once
- No credits for world/trigger kills
- Game messages no longer blocked
- Builders lose zombie gravity after a swap
New in 7.5-NS
- M main menu + admin menu
- Zombie abilities for every class
- Block HP and repair
- Shop, boss rounds, last human, MVP
- Daily and weekly challenges, /top15, /rank
- Builder roles and party
- Rock the vote, build-time and base votes
- Temporary build access for admins
- Anti-grief block log
- Open-source weapon balance plugin
Found a bug? Tell an admin in game or on Discord - this page is updated with every release.