The Karamjan god is a deity worshiped by the tribal people of Karamja, particularly those inhabiting the southern reaches of the island. The people of Karamja tell little of their god to outsiders since their origins and nature are a closely guarded secret, this is why this god is relatively unknown by most people in Gielinor.
The god is most prominently alluded to during the Jungle Potion quest, during which the elderly priest Trufitus Shakaya of Tai Bwo Wannai Village wishes to commune with him. To do this, Trufitus must prepare a ceremonial collection of herbs, which will place him in a mental state that will supposedly allow him to speak to him.
Karamja is also dotted with archaeological and cultural evidence of deity worship, both ancient and modern. The Brimhaven Agility Arena, for example, appears to have been a massive subterranean temple constructed centuries ago. Asgarnia Smith, a Varrock Museum employee and adventurer, mentions recovering an artefact known as the Golden Monkey of Tee-Tah-Toh while in Karamja, which may have been modeled after a local deity (the gods Marimbo and Apmeken also resemble monkeys). Many ruins scattered about the island also suggest the belief in a supernatural deity. There are also references to Zamorak during the Shilo Village quest.
The still-used idol constructed in Tai Bwo Wannai's centre is perhaps the most prominent indication of deity worship, its powers imbuing those who pray at it with holy energy much like the altars of other gods.
Despite these finds, little is known of the god itself primarily due to the secretive past. Mod Osborne has stated that Karamja has its own god and that Jagex has not forgotten about them. The god will be featured heavily in upcoming content and central to much of the story.  And even more recently, Mod Osborne confirmed in an interview that they have a story for one of the Karamjan gods and that there may be others.
A † denotes that a god is deceased