I was thinking today of
- swapping the 3 hit health track with Sanity
- combat drugs with a 'mind bleach' pill
not sure what to armor
making two phases to each alien/mythos (replace planet with mythos/alien/demon/whatever)
phase 1 - investigation ( players need to get so many hits on the investigation phase to make it to the next phase
phase 2 - combat/trap phase where the players need to defeat the alien.
flashbacks could be used in either phase, but obviously using them in phase 1 would mean the team was less powerful for the phase 2 fight