- Estimated achievement difficulty: 5/10
- Offline: 42 
- Online: 6 
- Approximate amount of time to 1000: 40-60 hours, depending on exploration
- Minimum number of playthroughs needed: 1 [+3 Partial]
- Number of missable achievements: None
- Do cheat codes disable achievements: None
- Does difficulty affect achievements: No difficulty settings
- Glitchy achievements: Yes, some issues with "Right 4 Life" and "There and Back Again."
- Unobtainable achievements: None
- Extra equipment needed: No
Bloodbath Arena DLC
- Difficulty: 3/10
- Time to 250: 3-5 hours
- Unobtainable: None
Dead Island is an open-world Action RPG with a heavy focus on co-op gameplay similar to Borderlands crossed with the feel of Left 4 Dead. An amazingly fun, frenetic experience with friends and a slower paced, more suspenseful feel alone. There is no difficulty to worry about. One thing you may want to do is back up your save file to a USB drive or memory card. There has been known issues with corrupt saves (completely random).
Step 1 - Campaign:
First you'll want to pick your main character. You should know your playstyle, so choose the tank (Sam B), assassin (Xian Mei), ranger (Logan) or support (Purna). You can do the entire campaign any way you'd like. Completely solo, completely co-op or any combination of the two. You can also just follow the main story and nothing else, or explore and do everything possible.
Don't worry too much about the specific achievements for unique actions. These are mostly done easiest at the beginning of the game, so you can always quickly start a new save file to knock them out, or join a friend's level one co-op game. Play as you like and you'll grab most of the achievements along the way without even trying.
Step 2 - Replay Act 1 Three Times:
Using the other three characters you'll need to finish at least the first act of the game. You can continue using any of them in the next steps, or revert to your "main" character since you might still need to hit level 50. See the "Right 4 Life" achievement for more info on this step.
Step 3 - Co-Op:
NOTE: For the co-op achievements you will need to play/boost with players with the NTSC-J version of the game, whether it be online or system link.
The quickest way to get through your co-op achievements is to join three people in a game one of them made, all playing as different people. Do a minimum of five quests with them and spend fifteen minutes in the game. From there, you'll only need another 20 quests in co-op and seven other fifteen-minute friends.
At this point, there is little that you likely haven't done. You may need to grind out some kills that weren't of your normal play style or reach level 50, things like that. You'll have four different save files minimum to go back to if you're missing anything though.
To begin the Bloodbath Arena DLC, go to any fast travel board. There is a door in one of the tunnels in the resort area that takes you there. All the achievements in this DLC (except "Looking for Trouble") can be done on arena A (easy) which, if you've already completed the original 1,000 and have a level 50 character, makes it a complete cakewalk. Each arena has a unique mod to be found and many enemies will be carrying unique weapons to loot, so watch out for those.
Note: Despite many of the descriptions saying "survive," you can actually be dead in co-op when a wave ends and you will still receive credit for completing it. You will respawn at the beginning of the next wave. Obviously playing solo you'll need to start over.
Step 1 - Wave 30 in Co-Op:
Find a group of one to three other players (more the better) and set aside some time to get all the way to Wave 30 completed in one session (90+ minutes). If you're good with them, turn on Analog controls for half the session to knock that out at the same time, though you have three other characters to use for fifteen waves so it isn't required and will likely be harder if you do try. You can also do the five waves with only punches/kicks and ten waves with only custom weapons during this run.
Step 2 - Three Partials, 15 Waves Each:
Using the three remaining characters, you'll need to do the first 15 waves each on any arena. You also need to do at least five waves in each arena (see step three), but it's best to use your strongest character for the harder arenas, so just do arena A (easy) for 15 waves with everyone.
Step 3 - Five Waves in Each + Complete a Set:
Using your strongest character, complete five waves in Arena D (Moderate) and Arena B (Very Hard), then enter Arena C (Hard) and make it to at least Wave 14 so you can kill one of every enemy type for the "Complete a Set" achievement.
Step 4 - Mop Up:
If you did not get any of the kill-based achievements during the previous two steps, setup the proper conditions and do them now to finish the 250.
Some of the co-op achievements take a bit of co-ordination to earn, but for the most part this is a fairly painless 1000 and a very fun game!
[XBA would like to thank Skorpion XBA and The Pants Party for this Roadmap]