I figure that the Shin Megami Tensei Pentagram [http://defaultprime.com/wp-content/uploads/2009/07/ShinMegamiTensei.jpg] would probably make a great tattoo, but given what you've said about your preferences in games I doubt it'd work for you.
Though, given your preference for visceral, survival horror-type images I'd second the Prototype suggestion, and offer Dead Space for consideration.
And finally, as an alternative to massively armored or half-naked men I'd also toss in Bayonetta as an offering. After all that game has dozens of different provocative poses to choose from, most of which also involve her kicking ass....