Part of the reason I like SLA is that it's pretty easy to pick up, it has a nice setting, and it's really best appreciated with only an idea of the game world. I've played AD&D, MERPS, Runequest, Warhammer, Rifts (and other Paladium stuff), Call of Cthulhu, Paranoia, Star Wars, Vampire, and probably a couple of others I've forgotten. Out of them all I like SLA the best.
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The setting is a sort of alternate near-future. Play generally takes place in the huge city of Mort on a planet of the same name, although space travel can take layers to other planets occasionaly. Mort, architecturally and atmospherically, is a hybrid of Bladerunner, The Crow, and Escape From New York. The universe is dominated by a megacorporation known as SLA Industries. SLA isn't exactly a benevolent master, and the game involves a lot of corporate intrigue and manipulation. The Company makes it very obvious that if you mess with them you'll fall in a big way. Luckily player characters work for SLA.
PCs take the form of Operatives (commonly known as Ops, SLA Ops, or Slops) - freelance agents hired by SLA to perform similar tasks to what the FBI might. This makes the game quite investigation-heavy at times, but there is also an awful lot of hardware at a player's disposal in to form of armour, guns and gadgets. On top of this the world is deliberately dominated by TV, and many Ops strive to become celebrities through their work. Success on the media circuit can mean sponsorships and good money, and the opportunity to become a Contract Killer - a superstar celebrity gladiator/bounty hunter.
Humans aren't the only beings in the game, although the majority of alien races were wiped out by SLA in the Conflict Wars. The three remaining alien races were spared because of their unique qualities and pretty much exclusively work for SLA. All are available as PCs.
Humans: Humans are by far the most populous race in the game. 90% of the people you meet will be human, and the other 10% will probably be Ops like you.
Frothers: Frothers are human, but they're classified differently because the drugs they take give them greater strength and resilience. Frothers rigidly stick to a celtic clan society, but are generally chaotic and disruptive. Their drug dependency horses them to work constantly to earn the money for their habit, but seeing as their work generally consists of fighting they don't seem to mind. If you see a psychotic armoured bloke in a kilt waving a big sword about and doing stupid things in combat, you're looking at a Frother.
Ebons: Look human but for their eyes, which are one colour without a pupil or iris. Ebons are poetic and thoughtful, very much ruled by their emotions. They were spared because of their ability to use the Ebb - the closest thing in the game to magic. Ebons calculate mathematical formulae at incredible speeds in order to influence probability and create seemingly magical effects. All of this is made possible by the living armour-cum-computer they wear called a Deathsuit. No other race wears Deathsuits, and Ebons never wear any other armour.
Brainwasters: Brainwasters are a sort of genetic offshoot of Ebons. They're the same race, but they're all bad. They're extremely aggressive, bordering on psychotic. They can be distinguished from Ebons by the black scorchmarks aroundtheir eyes (a genetic defect) and the fact that they dress like Ty. Wasters also use the Ebb, but tend towards the more destructive skills.
Wraith Raiders: Raiders are a sort of cat-like alien. They're not feline in a furry way, and they look more like lizards to me, but that's what they are. They're sneaky types who are most often in the role of scout or sniper. They're also fast and agile and, due to the low temperature of their homeworld, like the cold.
Shaktar: Look a bit like a lizardy version of the Predator. They're big warrior types with a sort of samurai code of honour.
Stormers: Stormers are biogenetic soldiers, created by SLA to fight and die. They're huge, powerful, incredibly tough, and completely loyal. They generally enter service as Ops after two years out of the vat, and as such they're rather naive and certainly not clever. Kind of like 8-foot tall children capable of tearing your head off, but not as unpredictable as kids.
Stormer varients: There are other types of Stormer that are less common. The larger but more stupid Chagrin, the stealthy and weird looking Xeno and the shape-shifting Vevaphon. Personally I'm not taken with any of these. All biogenetic races are classed as Stormers, even the NPC Domino Dogs or toy Dooberies, but generally the name refers to the 818 variant described above.
As well as the different races, in true RPG style, players have a training package to start off with. Scout, Investigator, Corporate, Death Squad (soldier), Kick Murder (assassin) ,Pilot, Media. There are more I've not read about yet too, but all characters can learn all skills, so it's really only a thing to start you off and define your character's role.
PC Ops form part of squads, and are given quite a bit of artistic license. Individualism is encouraged in order to stand out and be noticed by the media. It is generally the media who issue missions to squads in the form of BluePrint News files (BPNs). Complete the BPN and you get paid and will recieve a Security Clearance Level (SCL) increase. The higher your SCL the better mission you have access to, and teh more respect the company gives you. Progress is slow though, and money is always tight in this game.
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I've ran two very successful campaigns of this game. A lot of people find the dark, brutal setting mixed with corporate attitude and media attention to be quite compelling. Gameplay is supposed to be urban horror - serial killers and subhuman creatures are common in the city - but there is a very detailed and unforgiving combat system behind it. I've modified the system to make it a bit harsher too, as I like the gunfights to be fast and dangerous.
Main rulebook (including a lot of background, stories, pictures etc..) is downloadable here for free:
http://www.rpgnow.com/product_info.php? ... s_id=21127&
More information on what I've written can be found on the game's site here:
http://nightfallgames.co.uk/
If people are interested in playing I'll elaborate more on characters and equipment and give people individual briefs on their race, training package, what they know about the world etc..