Your words do honour to the Chapter, Brother-Captain.
New Orc tiles were added in Space Hulk: Tactics, featuring Explosive Barrels and Fungal Spores. The Eldar ships have Teleports and those Warp Thingamabobs.
Get a little creative with the Mission Editor (which is absolutely brilliant), and you could probably create a jungle-like trench-setting for a skirmish, if you wanted.
To the darkness I bring fire. To the ignorant I bring faith. Those who welcome these gifts may live, but I will visit naught but death and eternal damnation on those who refuse them.