- Estimated achievement difficulty: 4/10
- Offline: 47 (1000)
- Online: 0 (0)
- Approximate amount of time to 1000: 10-15 Hours
- Minimum number of playthroughs needed: 1
- Number of missable achievements: None (Levels are replayable)
- Do cheat codes disable achievements?: No cheats
- Does difficulty affect achievements?: Yes
- Glitchy achievements: 2 (Fireworks & Grease Monkey, see introduction)
- Unobtainable achievements: None
- Extra equipment needed?: None
DLC: Survivor Missions
- Difficulty: 8/10
- Time to 250: 4-10+ hours, heavily skill-based
- Unobtainable: None with latest patch
Dark Void is a fairly easy game to get the full 1000 in. A lot of the achievements are earned from beating the game, and the rest are either cumulative or can be easily earned by replaying levels. That said, there are still some glitchy achievements you will need to look out for.
Fireworks - The exact requirements for this achievement are unknown, but there are two methods that can work. The methods can be found in detail here and here. For some people the first method worked better, and for some the second worked better, so alternate if you have trouble.
Grease Monkey - This achievement is glitched so badly that it can become unobtainable. The only method that has been proven to consistently work can be found in detail here. As long as you follow those instructions, you shouldn't have any problems.
Step 1: Hardcore Playthrough
To earn the full 1000, you have to beat the game on the Hardcore difficulty. It has some hard parts, but overall it's not too difficult, so it's best to start out on Hardcore. In order to minimize the amount of time you'll spend replaying levels, you'll also want to go for Mark of the Adept, Master of Arms, Blind Luck, Big Bang, Get Your Feet Wet, 99 Red Balloons, Cliffhanger Killer, Those Aren't Fortune Cookies, Dear Diary, and Bookworm on this playthrough using the guide below. Don't worry if you miss any of these achievements, though, because you can replay any level after you beat the game.
Step 2: Replaying Breaking Camp (Wrap-Up)
If you got all of the achievements mentioned in Step 1, every other achievement is obtainable by replaying the level "Breaking Camp" on casual difficulty, which I suggest you do for two reasons. One is that a lot of the achievements involve UFOs, AA Guns, Archons, and Survivor Planes, all of which are abundant on this stage. The second reason is because for Grease Monkey you need 141,600 Tech Points, and Breaking Camp is by far the quickest place to earn them at 7,000+ per run. Just use the guide below for any achievements you're having problems with and you should be done in no time. Also, note that all progress towards cumulative achievements carries over from career.
Congratulations, you now have 1000 on Dark Void! (assuming you didn't run into glitches)
When the DLC was released, multiple achievements were broken. If you want to play this, make sure you connect to LIVE and download the latest patch.
There are two maps, Battle of Ghen Crag and Abyss Canyon. In theory, you can get all achievements in one complete play through of each map, taking about 30 minutes each. However, this DLC is a survival-type battle with multiple waves of enemies, and to beat them will take most people hours of practice and learning the enemy spawns.
Start with Battle of Ghen Crag and work on beating all 10 waves while scoring 4.4 million points. Once you have done that, clean up any achievements you have missed that the guide recommends to do on Battle of Ghen Crag, and then switch maps. Abyss Canyon has a few achievements that are easier to complete on it (Bulletproof and possibly Freedom Fighter), but mostly you will need to learn the map and the spawn points, and then focus on unlocking Top Ace. This is the single hardest achievement in the entire game, not just the DLC, and many folks have spent more hours on this than the entire campaign.
While straightforward in concept, the mechanics make this DLC mediocre at best, and overly frustrating for many people. The achievements are all straightforward and clear, and despite the difficulty of Top Ace, all of them can be unlocked in a patched game.