- Estimated achievement difficulty: 8/10 [4/10 if you own the DLC] [Achievement Difficulty Rating]
- Offline: 36 
- Online: 0
- Approximate amount of time to 1000: ~30 hours [Estimated Time to 100%]
- Minimum number of playthroughs needed: 1 + a partial playthrough
- Missable achievements: 4 if you own the DLC; If you don't have the DLC, many more become missable, argueably pretty much all non story-/kill-related achievementss [read the walkthrough for more info]
- Does difficulty affect achievements: Yes [can mostly be mitigated by owning the DLC]
- Unobtainable/glitched achievements: None
- DLC: Seed of Evil
- Difficulty: 4/10
- Time to 470: ~10 hours
- Missable: Anti Vaxxer (50G)
- Unobtainable: None
Mutant Year Zero: Road to Eden is a quirky genre-mix game where you explore and sneak around, have light RPG-mechanics, but once you enter combat it plays as a turn-based strategy game, similar to games like XCOM.
The way you generally want to play is that you explore a zone and take out as many enemies as possible with stealth before you instigate the main encounter(s) of a zone. For that, make sure you get a silenced weapon for all team members as soon as possible.
What I did was I mostly used Hog-rush with Bormin to knock out an enemy for two rounds so I could kill him with silenced weapons, without me or him alerting more enemies. For robotic enemies, EMP grenades work very well too.
Once all enemies that can be singled out are gone, I instigated the main fight in such a way that I start from an advantagous position (me being on elevated terrain, quickly being able to take out or mind control the most dangerous enemies). Everyone has their own style though, so try stuff out and see what works for you.
This game has one expansion as DLC, and whether you own this or not quite substantially changes how you should tackle this game's achievements, and how hard the process will be. I found this to be quite an enjoyable game, and if you have the DLC, it's not too difficult.
Note that this game has a "platinum"-style achievement for unlocking all other achievements. This refers only to main game achievements and it works in such a way that you can just get an achievement and then instantly reload a save, as some of the misc achievements are easier to get with suboptimal "suicide ways" to do them. So, the action that unlocked the achievement doesn't need to be saved.
The easiest/most efficient way to get all achievements in this game varies greatly depending on whether you own the DLC Seed of Evil or not. Completing this game will be much easier with the DLC.
For QA have suffered! (100G), you will have to play on Hard with Iron Mutant without losing a team member. However, My bad (10G) and Tastes like chicken (10G) require a team member to die, so you will have to do at least one full playthrough for QA have suffered! (100G) and then a partial playthrough for the other two. Iron Mutant disables manual saves, and it autosaves after each turn. Since some of the miscellaneous achievements may require suboptimal play, you may just want to do a playthrough on normal to get to know the game and knock out all the miscellaneous achievements, and then do a Hard/Iron playthrough afterwards.
If you have the DLC, you can just start a new game on Hard/Iron for the achievements and select pre-set DLC characters. Now you can just quick-travel to Eden to unlock all the difficulty achievements.
During your playthrough, you'll have to look out for this missable stuff:
- In "Lair of the horned devil," sneak around to the back where there is a barn. Get up onto the first floor of the barn and interact with the computer here. Now if you start the main fight in this area, the Mech will support you in this fight. The Mech has to be destroyed in this fight, either by you or the enemy. If the Mech was destroyed, you can pick up an artifact "El Generato." This will account for two missable achievements: Demo thing (10G) and 100% Old Skool (100G).
- In the area "Castle of Light," an NPC called Lux will want you to get his key. If you get the key, don't bring it to him, but rather open up the building in the back of his base (turning Lux and his crew hostile). You need to access the building for an artifact for 100% Old Skool (100G) and Fitness club (15G). Also, you want Lux hostile to get the Lights out! (25G) achievement.
- You won't have enough level up points to get all the mutations and stats, so focus on the mutations (you're definitely in the green to get the first two stat increases). If you own the DLC, you can ignore this point, as you can seamlessly transition into the DLC and gain more levels there.
- Enemies don't respawn, so pretty much all the miscellaneous achievements are somewhat missable. If you complete the game without getting them, you'll have to start a new game and play up to that point that the specific character/skill becomes available.So, aim to do these achievements before you kill everyone: My bad (10G) Tastes like chicken (10G) Bormin smash! (10G) Om nom nom! (10G) The power of flesh (15G) Green fingers (15G) Frying tonight! (15G) And stay down! (15G) Butterfingers! (10G) Unnaturally successful (10G)
- Pay specific attention to Unfriended (10G), since you need an enemy that can mind control. The last enemy you encounter that can do this is Plutonia, so if you haven't gotten it before, make sure you get it in that fight. If you own the DLC, you can just start a new game as pre-set DLC characters and do whatever you need either in a DLC area or in one of the repopulated base-game areas. Visit Lux in Castle of Lights as an enemy that can mind control for Unfriended (10G).
You may or may not have unlocked all the miscellaneous and cumulative achievements during your playthrough. If you didn't you can just start a game as DLC pre-set characters and quickly mop up what you still need in any of the zones. If you don't have the DLC, you can either do them in one of the optional areas if you haven't cleared them yet, or you need to start a new game. If you haven't gotten all collectibles (notes, artifacts, etc.) you can check your backpack in the inventory to see which ones you have and which ones are still missing, and specifically hunt down what you need. Refer to the achievement guides below to see further detail on specific achievements.
You can either use an existing save and transition into the DLC once you beat the game, or start a game as pre-set DLC characters. You only need to complete the DLC on normal difficulty with Iron Mutant this time for Tough Nut (100G), but there is no way to cheese it, like the main game. Make sure to never use Medikits for Anti Vaxxer (50G). If you transition in from the main game, it is okay to have used prior Medikits, but stop once you reach Eden.
It's your choice if you feel comfortable beating it on Iron Mutant without Medkits and can still pull off the miscellaneous achievements, or if you want to do a seperate playthrough. Give or take half of the DLC content is sidestuff from the main story, so a straight story run through the DLC story may only take you around four hours.
The notes, which were in the main game as just a thing to collect to learn about the lore, are now tied to an achievement: Chronicler (25G). For this you not only need to find all the notes in the DLC, but in the main game as well. These however aren't missable and you can check your backpack which ones you already have.
Fun game and not too hard if you own the DLC. Still, the game is no walk in the park, especially if you are unfamiliar with the game and genre. It can be quite punishing. It's your choice if you want to tackle "Iron Mutant" which means no save scumming and permadeath right away, while simultaneously going for all miscellaneous stuff, or if you want to do a seperate playthrough where you can just focus on optimal play to beat the game. Good luck. If you have questions or feedback, you can write me on this site's forums or on XBL (GT: Fanta Morgana).
[XBA would like to thank Fanta Morgana for the Seed of Evil DLC Roadmap]