Well, technically speaking, I'm not sure if a text based game can actually be a first person shooter, so let's just call it a shooter! This is insane nonetheless: it's a shooter built using the mechanics used in super old school text adventures. Man, the nostalgia... crossed with the pain of terrible functionality. So many feelings!
And yes, I'm old enough to remember playing (and being completely confused by) text-based adventures, so this is a real novelty for me. For you younger folks, consider this an education of the struggles the older generation had to go through in order to enjoy video games!
You can check out the game here!