I think it would be awesome if RPG would implement an "immersion HUD" option. This idea is based of something shown in a cinematic from way back (since the media-insert doesn't support YT time-codes, skip to 1:34 if you're in a hurry - but the vid is totally worth the watch!) : Now, I dunno about you, but I'd absolutely <3 LOVE <3 to be able to play like this. Sure, it wouldn't be as competitive as an "empty" basic HUD, but *damn* the immersion would be staggering. And I doubt it would be that hard to implement too! A bit of art-work for the overlay, the HUD elements would stay the same, if in different positions or whatever. And the breathing and heart-beat could be tied to a simple variable that increased as you ran, got shot etc. and decreased over time as you walked, crouched, stayed still etc. And I doubt it could be that hard to slightly muffle the external noises to mimic the effect of wearing a helmet.