I'd like to talk about the achievements in Dead.
I've made sure that each achievement brings something new. Nothing silly like "Kill 10 Rats" but instead, new challenges and interesting ways of killing bosses.
In other words these achievements are not a waste of your time.
For example, one achievement is to kill a particular boss without using your self-combustion ability. A harder challenge is to kill the same boss without moving!
There are medium and hard achievements for every boss in the game if you find Dead to be too easy.
I also make sure to complete every achievement personally (except for the hardest one, which you can see above on the right)