EDIT: I really intend to revise and flesh out this post, but I'm busy falling in LOOOOOOOVE.
Tiglers are the humanoid descendants of white Martian apes. They are very similar to modern humans in all respects except that they have two extra vestigal arms ('tickle arms') below the human-normal two, and that their genetic code isn't stored in the form of DNA. It's something Martian. How they survived on Earth with this fundamental incompatibility is a mystery shrouded by eons.
Treat Tiglers as ordinary humans but with the following modifications:
Tigler Scholars have had some success decoding the technical 'manuals' in the data banks of the impossibly ancient Martian Martial Arts Pleasure Rockets, so any Tigler has a base 1in 6 chance to know how to operate newly discovered relics of Martian technology.
Sometimes Tiglers have lasers.
Tiglers worship two "Gods-In-Flesh," the time suspended Dinosaurs-With-Lasers in the Valleys of the Crash, and The Great Ape, a still-living 200-Million-Year-Old white ape of Mars who during the Great Folly ate the Mother of Trolls and has only grown larger and angrier since. He is also worshipped by trolls as the Trollfather.