A straight forward dungeon bash, with the only twist being that the inhabitants are gnomes rather than goblins or whatever. The scenario is written for 1st to 3rd level orc characters, but they could be anything, so long as they're evil. Change the gnomes to some other race, or tweak their alignments, and the PCs don't even have to be evil. (This would, naturally, require some alteration to the encounters, but to be honest, not very much.)

There is a page of advice at the end on how to play orcs, although it doesn't really address the question of 'evil' acts in play - orcs, it seems, aren't really all that different from some PCs, only a bit more cowardly.

It's all competently written up, well illustrated, and properly laid out. But at the end it's a dungeon bash no different from any other, and not quite as 'different' as it would like to be.

An RPG Resource Review:

You don't have to be an orc to play this, but being evil helps... In this adventure, a tribe of orcs planning on annexing an area of the hills above the Khydoban Desert sends a raiding party - the characters - to investigate an outpost set up by the resident gnomes who are concerned about the marauding orcs.

The gnome outpost is well-detailed in a manner conductive to easy running of the adventure - room descriptions, contents, apposite rules and even the likely responses of the occupants to tresspassing orcs are all there where you'll need them. In the unlikely event that a visiting orc character wants to talk rather than fight, the DM will have to decide on the reactions for himself - the scenario is intended as a 'here is a location through which you can rampage' adventure, non-fighters will not have much to do.

As a one-off, or part of a campaign based around a group of orcs, this will make for a splendid evening's entertainment for a bunch of low-level characters. It also serves well if you have need of a gnome outpost (indeed anyone's outpost although the design is typically gnomish) within your campaign setting even if you don't have orcs to raid it at the moment.

Overall, it is nicely put together, with illustrations and maps, monster/item details and even an essay on how to be an orc tucked away at the end.