Here is the beta-version of the ioquake3 version of the SlugRock mod
SlugRock.zip
Completly rebuild from scratch upon the ioquake3 source-code by UglyFoot.
You'll need to have ioquake3 installed to play the mod
(get it here => http://ioquake3.org)
Check the progress on GitHub: https://github.com/takkie/slugrock
The new version is much more configurable, the cvars can be set in the menu and it features all the greatness from the ioquake3 code!
Comments and feedback appreciated

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Older version of SlugRock are not available for download anymore.
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edit 17-11-2013
I've been working on the new branch 5.x
There are a couple of changes:
the g_teamweaponSwitch is now g_switchteamWeapons
the rockets are killable
the bot code is different because i couldn't remember what i did in 4.21
And there is a bug in this version

When you frag an opponent with the railgun sometimes the fragged opponent
disappears. So Instead of dropping to the floor or gibbin' completly all there is left
is the little floating 1.
I remember having the same problem in 4.21 but at some point i fixed it
and i can't remember how. (keep away from drugs people

iirc i found a fix in a q3coding-tutorial that was about something else.
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original post....
Over the past few years i've build this little mod
named SlugRock (slugs and rockets).
All items, powerups and weapons are removed from the map,
except for the flags in CTF.
Every time you (re)spawn in the arena you'll get the railgun
or the rocketlauncher.
In teamgames you can set the option 'forceteamWeapons' on.
In this case players on the red team (re)spawn with the
rocketlauncher and the players on the blue team (re)spawn
with the railgun.
If you set the option 'forceteamWeapons' off, the weapon
you'll get will be random just as in ffa.
Because there is no health available there also the option
'healthRegen', with this option on a player will recieve
5 health points every second until the maxium health of 125
points is reached.
The railgun and the rocketlauncher are not modified!
It was great fun building it and i learned a lot.
Unfortunaly i lost the source code...
Before i start again with a new branch (slugrock 5.xx)
i'd like to get some feedback and some opinions...