Thinking of old games dificulty, I have just unlocked NES metroid and I agree with GoldShadow about how games were cheap interms of difficulty. For example, in NES Metroid, you start off with only 30 health points, no shooting on angles, no crouching, no map, hint in game hints, a power beam that can only shoot the lenght of samus and not every guy you kill gives you energy and the guys take alot of hits.
In Fusion, you start with 99 energy, a proper gun(Not that toothpick), can shoot on angles, can crouch, maps and briefings and x pops out of every guy to fill you back up, guys yake less hits and are slower.
You could argue that they did not have the technical know how back then, but some of those moves are damn cheap.
With PD, the only mission I have not completed on Perfect would be War!. That is just nuts. That took me aleast a couple of months of on and off playing to get there. Timeslitters is another story, 1 month and I am up to Robot Factory on hard with 83.7 % complete. Older games are indeed harder. (PDC, 3 hours and 33 mins 4 if you count death

, returned the game the next day for fusion, 5.03 first time. with death, close to 6.

)
GE, everything done. that took like 6 months of on and off.
A comparison with SW RS64 and SW RL:RS2, RL is clearly harder due to the fact that everything is more complicated. The objectives were harder, the number of guys after your blood, the number of things you had to control. The medal earning parameters are harder and closer to the human limit of possilbity.
May comman sense save us all from having no save systems in games. I tried to complete tomb raider 1 once on the saturn with no MC, long story short, never did complete it. Playing anything for more than 10 hours striaght is going to kill you and leaving the machine on will only end in grieve
P.S GoldShadow you must have had alot of fun hearing that beeping sound alot.