Upon completing every hack in all four alternative ways I was surprised to notice that I didn't get the achievements for completing every Hardware Crack, Trace Route Crack, System Override Crack and for completing every hack in Singleplayer. In frustration I put the game aside. Today I started thinking of a theory that might be the reason to why I didn't unlock my desired achievements. There's an achievement where you have to complete a single player session on the Leaderboards. Now I completed every alternative in the game, but it seems that the alternative you play on Leaderboards DO NOT count towards complete all four alternatives! I replayed the alternative that I played on the Leaderboards this time on Ignition mode, and when I started to get to the end of this Singleplayer playthrough the achievements starting popping one after another! I can't be the only one with this issue. If you've done everything and still haven't got the achievements, try to remember which path you chose when you played the Leaderboards mode. (I remembered mine because in the end of the single player you will see which paths you chose during the last played playthrough and I took a photo of it with my phone, so that I would not mix up which paths I've already played through and which I haven't.)
The paths that you need to complete (THE MUST ALL BE DONE ON IGNITION MODE!) are:
Route A: Act 1 (Start) -> Act 2A (Lighting Failure) -> Act 3A (Direct Route) -> Act 4
Route B: Act 1 (Start) -> Act 2A (Lighting Failure) -> Act 3B (Cross the Rim) -> Act 4
Route C: Act 1 (Start) -> Act 2B (Hostage Situation) -> Act 3C (Spacewalk) -> Act 4
Route D: Act 1 (Start) -> Act 2B (Hostage Situation) -> Act 3D (Interior Route) -> Act 4
By the end of the your final route you should get the last achievement which will be for completing every System Override hack (The achievement for completing every hack in the game will be unlocked just seconds earlier). You can do they in any order you want, as long as they're all done at some point!
I hope this guide helped you guys. Don't forget to thumb it up so that others that may be stuck can also sort out their 200G for this game!