To be honest, I don’t think this is a great idea for the game. Don’t get me wrong, I love STALKER. It is a game that all should take note of. Hell, a lot of Cataclysm takes cues from it and is better for it. Here’s the thing though. Just because it worked fine in STALKER does not garuantee it will work here. The most unique feature of the bloodsucker is it’s ability to turn invisible, which does a great job of throwing you off balance. STALKER is a shooter at heart, and when players see they can shoot something they know they can kill it. However, with Bloodsuckers, you can’t see them unless you squint, and when you do see them it’s too late, you’re done.
If done in Cataclysm, it wouldn’t work because Cataclysm is a roguelike without a focus on shooting and ASCII graphics. How do you represent invisibility except by having no indicator as to it’s presence? Sound cues and text messages wouldn’t work, even newbies would immediately cop on that something is due to the law of conservation of detail. Since the game isn’t based around shooting, where’s the horror? Bloodsuckers would just become another annoying thing and not the true monster they are.
However, if you want a bloodsucker in a roguelike, here’s what you do. You make an enemy, let’s call it a mimic, that has a random letter representing it as its icon. You aren’t alerted to it’s presence, to you it is just a rabbit or something. It isn’t until you put your cursor over it that you realize it for what it is, but then it will go on the attack. It won’t ever attack you otherwise, fleeing if you hurt it. This is because it waits for you to start crafting or sleeping or reading to attack.
Let’s give a description of this similar to how many STALKER players give their description of a Blodsucker encounter. It’s the end of the day and your guy is hungry, thirsty, and more bored then an illiterate man in a library. You sit near a window to read and see a deer randomly screw around outside. No biggie. You make him start reading a photo album whilst smoking pot to get that morale up. However, down the bedroom a window smashes! You press five and rush to check, expecting wolves or worse, a zombear. Weirdly, there’s nothing there that could have made the smash. Just a couple of deer.
You board it up and go to sleep, expecting an ordinary night… When suddenly…
“The mimic pierces your skin with an evil looking tongue!
The mimic reaches down and begins to tear at your skin!
You fire your Glock 19 x4
The mimic tears at your skin! x2
You have died. Any last words? >”