What gang-scale scifi games are there?

I'm aware of Necromunda, Gorkamorka and Death Squads, but outside of the universe created by Games Workshop, what games are there that use small squad/gang engagements?

Nuclear renaissance by [url=Ramshackle games]http://www.ramshacklegames.co.uk/[/url]

Infinity by Corvus Belli:
http://www.infinitythegame.com/infinity/en/
There is also Eden by Taban, with free rules (and some weird minis):
http://www.taban-miniatures.com/

Judge Dredd Miniatures game by Mongoose Publishing. Rules are free too. Keep chekcing the forum for updates.

http://www.mongoosepublishing.com/miniatures/judge-dredd/rulebook.html

For a Future War/ Post Apocalypse game try the Combat Zone Chronicles: http://www.combatzonechronicles.net/index.html

Found one more:
Mercs: http://www.mercsminis.com/Game.php

And these look promising to me:
http://www.defiancegames.com/
http://wreck-age.net/

Let's not forget Dark age, which carries a lot of grotesque postapocalyptic minis and has its own ruleset.

AND Aberrant Games Rezolution:

http://www.aberrantgames.com/darktomorrow.html

It's sort of a futuristic Mordheim...Chaos C.E.Os.

Are they 20mm ?

They seem a bit ....short....

The Aberrant Rezolution minis are 28mm to the eyes, which makes them roughly 32mm total height. The WarLands are I think 20mm.

How small do you want your squads? 5150 from 2 Hour Wargames is based on the Chain Reaction 3.0 rules, so you can check out the basic functionality for free. Star Army is for squad combat, while New Beginnings is for a small handfull of individuals per player, if I've understood things correctly. Here's a 5150 battle report I haven't read yet. You can find more info on the 2 hour wargames Blog as well.

I know even less about this, but Tomorrow's War was recently released by Osprey Publishing. You should be able to find some play examples online, since it's been in playtesting for a while. Here's a random review.

I personally haven't played it yet, but I know there's Stargrunt II (free rules!) which I think can be played at pretty small scale.

There's also Unbridled Fury, currently published by Tor Gaming, which is a generic set of skirmish rules for any setting, and Flying Lead by Ganesha Games (same folks who made Song of Blades and Heroes) which is another set of skirmish rules for modern-futuristic combat (i.e. pretty much anything that involves guns).

Last plug is for Songs of Our Ancestors, which is a skirmish game set in the Quar universe by Zombiesmith games. The rules are based on Flying Lead. I've been playing this last one a lot lately and having a lot of fun with it. The Quar's world is very quirky - kind of whimsical but also darker than it appears on the surface.

Final Days - Post apoc type SF game with zombies & Vampires & Demons & Mutants etc. kenzerco.com/index.php?cPath=34_35

If you are a Fan of the Fallout Series, there is a free one called Fallout warfare
fallout.wikia.com/wiki/Fallout_Warfare

I agree with Lord Siwoc, Ramshackle games have a nice gang game... But i hate the 5sided dice idea though, its just not to my taste.

I think that the models are cracking though, and the orks look plain scary