- Estimated achievement difficulty: 9/10
- Offline: 32 (600

- Online: 18 (400

- Glitched achievements: No
- Minimum playthroughs (offline): 2
- Cheats disable achievements: No Cheats
- Estimated time to completion: 40+ hours
This game requires you to have your Patience meter turned up to max. The campaigns themselves are difficult because this is not a normal run-and-gun First-Person Shooter. Even the sections that do give you weaponry punish you for running around with guns blazing! Shadows, darkness and caution are your best friends. If you get hit, back off and hide. If you have a health block that isn't completely depleted, standing still for a bit will regenerate that block to max. Missing blocks can only be replenished using NanoMed stations
Use the aforementioned stations as save points. Whenever you heal, a checkpoint will be saved. This can be useful on long sections where you think you should have had a save, but didn't!
Using the resources in this guide should net you all the collectibles and all the secret achievements, as well as all the story ones. If you miss a pack of smokes or a bounty card, replay the checkpoint on Easy, so you can quickly run through it. Collecting a pack of smokes or bounty card only needs to be done once on any difficulty. Starting the Campaigns on hard also cuts down on the number of playthoughs, as you can reload the last checkpoint on Normal to get that achievement too. The difficulties themselves only manage how much damage you take, not the level of AI. Enemies will still hunt for you and use their flashlights intelligently even on Easy, it just hurts less when the shoot you.
If you want a "full movie" experience, follow these steps
Step 1:Escape from Butcher Bay
Play Butcher Bay first as this happens before Athena and helps you set up with the story and the controls. Play on Hard as mentioned above, collecting all the packs of smokes along the way. Then reload the last checkpoint on Normal to get that done.
Step 2:Assualt on Dark Athena
Play Athena second as this follows on directly from Butcher Bay and by then you should be used to the control system. Collect the Bounty Hunter cards and play on Hard. Some would say Athena is easier than Butcher Bay. I would agree, but you're playing on Hard anyway, so its negligible. Again, play your last checkpoint on Normal once you complete it on Hard.
Step 3:Clean up
Go back through Butcher Bay and Athena, getting any smokes or bounty hunter cards you missed. This can be done on Easy.
Step 4:Online
All multiplayer achievements can be boosted in Private Player Matches, so check the Trading Thread HERE for partners. This will be the longest for those going for the full 1000, as you could be spending up to 40 hours getting the kills done.