Sandpit is a sandbox mod for Half-Life.

Features include:

  • Spawn menus for Half-Life and Opposing Force monsters, models and sprites
  • Pose menu for changing skins, bodies, world and mouth position position of monsters, models and sprites
  • Automatic mounting of Opposing Force, Counter-Strike and Day of Defeat content


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10 years ago the first version of Sandpit was released - it wasn't much - just the spawn menu and a few monsters from Half-Life, all based off some VGUI tutorials by Richard Zad at The Wavelength. For the next few years Sandpit got lots of updates with lots of features but by 2010 other projects (like Sandbot) had started to take up more time.

Sandpit's improved posing capabilities

In 2013 full-time work rolled around and not a lot of programming got done for fun anymore, but the updates to Half-Life and the release of the updated SDK re-ignited some interest and Sandpit started getting some more attention again. In the background, work on Basis got moved to new Half-Life SDK.

Sandpit's spawn menu

In 2015 a new job meant more desire to finally get Sandpit v4 to happen. Until then nothing had really been done beyond patching a code-base that was very obviously messy and in need of some love. Basis was tidied up and released publicly in 2015 and in 2016 and a new Sandpit was forked off Basis to take advantage of the fixes and structure that it brought. Work continued slowly for the next little while, but by the second half of 2018 it was still far from completion. The looming 10 year anniversary of Sandpit meant a lot of work got done in September, October and November of 2018 to get the most important features done in time.

Sandpit's spawn menu

In spite of best efforts, there was still an annoying bug in v4.0 that couldn't be reliably reproduced during testing and so a day later v4.0.1 was released to fix it.

There's still lots more planned for Sandpit (follow Sandpit to stay informed) - here's to another 10 years!

P.S. there are still two days left to vote for Mod DB's Mod of the Year - vote for Sandpit at Moddb.com

Transmission 15929

Transmission 15929

Feature 7 comments

A new episode of Podcast 17 featuring Stargate: Legacy, Half-Life 2: Dawn, Valve's recent interview on GTTV, brief discussions about SHIFT and Perfect...

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Sandpit v4.1

Sandpit v4.1

Full Version 76 comments

Sandpit v4.1 adds a new Sprite Menu, some Opposing Force entities, entity scaling and more.

SandPit 4.0.1 (EXE)

SandPit 4.0.1 (EXE)

Full Version 16 comments

SandPit 4.0.1 installer version. Automatically detecting Steam HL1's path.

Sandpit v4.0.1 (ZIP)

Sandpit v4.0.1 (ZIP)

Full Version 46 comments

Sandpit v4.0.1 fixes stability issue in the previous release.

Sandpit v4.0 (ZIP)

Sandpit v4.0 (ZIP)

Full Version 20 comments

Sandpit v4.0 is a complete re-write of Sandpit on the latest version on the Half-Life SDK.

SandPit 3.7.1 (EXE)

SandPit 3.7.1 (EXE)

Full Version 40 comments

SandPit 3.7.1 installer version. Automatically detecting Steam HL1's path.

Sandpit v3.7.1 (ZIP)

Sandpit v3.7.1 (ZIP)

Full Version 34 comments

Fixed crash on map change (thanks SylvesterBarry@ModDB). Extract the .zip to steamapps\common\Half-Life\ and restart Steam to play.

Comments  (0 - 10 of 1,130)
Shelby_Kun
Shelby_Kun

Any way to go thirdperson?

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tschumann Creator
tschumann

Shelby_Kun the "thirdperson" command should work like in standard Half-Life.

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Shelby_Kun
Shelby_Kun

Didn't work for me. I have zero clue why

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Guest
Guest

man, but its possible to use half life opposing force entities in spawn menù? because prop menù it spawn a non-alive entities and he cant fight against other :(

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tschumann Creator
tschumann

You should be able to spawn some Half-Life Opposing Force monsters from the spawn menu - at the moment it's only the blackops helicopters though.

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Guest
Guest

when i try to start a server with opposing force entitites it doesnt work and this is what console tell about the error:
Host_Error: EV_Precache: file events/penguinfire.sc missing from server

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tschumann Creator
tschumann

Do you have Half-Life Opposing Force installed? And are you using Steam?

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Guest
Guest

its possibile to use spawn menù on half life opposing force?

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tschumann Creator
tschumann

It sure it, but yeah need to mount Half-Life Opposing Force in the Create Server menu.

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Guest
Guest

Its a nice mod but i have questions:
1-Its posible to download weapons for other games?
2- can play it online like join in a server or create a server?.
3-doenst have a steam VAC for using it?

Thanks.

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tschumann Creator
tschumann

1. Not easily - they need to be reimplemented, and GoldSource has a 32 weapon limit.
2. Yes you can - just like any other mod.
3. Not sure what you mean but through Steam it will VAC unless you disable it I think.

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Latest tweets from @teamsandpit

Zeno Clash Multiplayer is now open source: Github.com #zenoclash #aceteam #modding

May 20 2022

Sandpit Nightfire is now open source: Github.com #nightfire #goldsource #modding #sandpitmod

Jan 2 2022

Sandpit Nightfire v0.1 released: Moddb.com #nightfire #goldsource #modding #sandpitmod

Sep 16 2020

Posing sprites #halflife #goldsource #modding #sandpitmod T.co

Oct 6 2019

Playing around in Sandpit #halflife #goldsource #modding #sandpitmod T.co

Feb 24 2019

New Sprite Menu for next version of Sandpit #halflife #goldsource #modding T.co

Feb 1 2019

Expanding pose menu for next version of Sandpit #halflife #goldsource #modding T.co

Jan 9 2019

Sandpit v4.0.1 has been released: Moddb.com #halflife #goldsource #modding #hotfix T.co

Dec 8 2018

Sandpit v4.0 has been released: Moddb.com #halflife #goldsource #modding T.co

Dec 8 2018

Next version of Sandpit is nearly ready #halflife #goldsource #modding T.co

Nov 24 2018