Yup, yup they definitely are.
Devil Survival I played nearly two days straight through going 'just one more demon, just one more demon and
then I'll put it down.
DayZ is 'just one more playthrough *half an hour later after a horrible death of some sort-usually zombies, mostly my fault * Just one more playthrough'. (Damn you Yahtzee for reviewing this and making me want to play it again XD)
It's always just one more... something, huh?

.
Just for fun:
Overview of Swix's DayZ deaths:
Plummets to death from top of crane due to graphical glitch induced misstep=not my fault
Beaten to death by door and window glitching zombies=not my fault
Getting shot by another player and then bleeding out=not my fault
Getting cornered by randomly exploring zombies in houses without any weapons-twice=my fault
Running into a group of zombies in coastal city and not noticing the sneaky one that came up behind me until it had clubbed me over the head=my fault.
Trying to take on the big cities with only an axe and then desperately sprinting from house to house just to find enough food and drink to get to the next house intermittently passing out due to not reacting fast enough to zombie attacks=my fault
Setting off into the middle of the wilderness with no means of navigation with only an axe and dying of hunger and thirst at the top of a mountain plain=my fault.
Drowning after trying to swim out to an island=my fault
Finding a pistol and rushing out into the street to test it only to realise it had no ammo=my fault
Accidentally setting off the shotgun and then trapping myself in panic=my fault