Guild Wars 2

Which is easier to get the achievements ? playing solo or with a party ?

Solo. It goes alot faster. If you’re going with a group there is always someone who sucks so hard, that you’ll have to wait for like 10 minutes.

Easier solo, funnier with a group

Group:
+ can reconnect to game
+ easier to slay things
+ In Trebmode makes many puzzles less RNG (FREAKING INVUL CLOUDS)
+ Someone might have an item you need finish (or vise versa)
+ hilarious watching people die
+ even more funny when you’re waving a balloon
- might take long if someone is struggling
+ however, its good to practice the path over and over wile others are trying to get to the next objective.

Solo:
+Less waiting around
- D/C and games over
- Certain enemies can be annoying to deal with solo

If you DC a lot, solo might make you rage.
But otherwise, do it solo. Especially now people have made guides.