Are the last 2 achievments even possible to get, lol?

What does it mean by 'unlock all ability's' and 'unlock all infantry units' because I've unlocked all of them but i don't have the achievement.

hah have a nice day and good luck with all the achievments i hope that you will obtain that one with trenches

Thanks for the info. Now I gotta do is grind, hope for the best, & don't go mad.

like i dont really know too much about that achievment but i think its about to upgrading from 1 or more to max and i dont really know if you need a machine gunner so you need to watch some tutorials or something beacuse im not into the achievments too much but thanks for asking and commenting

Thanks, does that include building the trench from 1 to max by yourself (meaning if the ai upgrades to trenches you have upgraded at least once, do you get the credit for that) I know there are some maps that have partially upgraded trenched so I just didn't want to wast my time on those maps.
Also, does this include adding machine gunners to the trench & can achievements be completed on custom/community made maps?
Pardon all the questions I would just like to be thorough & you just happen to be best available source; if you cant answer all my questions I'll be alright.

i think you just need to fully upgrade trench with money in game session 100 times

Q: What counts as "Fully upgrade 100 trenches", "Unlock all abilities", & "Unlock all infantry units"? It's just a bit time consuming trying to finish a task that I don't know if I'm progressing or not. - P.S. - Pardon my poor English.