-Estimated achievement difficulty: 4/10
-Offline: 12 (400 )
-Online: 0 (0)
-Approximate time: 4-5 hours
-Minimum number of playthroughs needed: 1 + Level 15 replay
-Missable achievements: None
-Does difficulty affect Achievements? Yes
-Unobtainable achievements: None
-Extra equipment needed?: 2 controllers
-Cheats: No Cheats
Welcome to Double Dragon II: Wander of the Dragons, a remake from the NES - Megadrive hit that unfortunately fail in a lot of ways. In fact, we can objectively call this game an aberration for the classic that this game was. The game is incredibly laggy, with controls even slower than it's original predecessor and a lack of online co-op, meaning you gotta do the co-op achievements locally. Very frustrating enemies, not necessarily because they are hard, but because sometimes bosses will make a joyous habit of falling to the ground every time you're gonna throw a punch at them, giving you an unnecessary very long and boring fight. Fortunately, there's sometimes a sweet justice in this world and there's a way that you won't need to do the entire game more than once to get every achievements, see the following.
Step 1: Story mode
I highly suggest to do story mode on easy, there's no need to put it on hard, you already gotta deal with major lag so save yourself some pain. During the entire campaign, be very careful not to use a Special Attack ( + button), this have to be done in one sitting, if you do it accidentally you have to restart from the beginning so do yourself a favor and don't press at any cost. Upon completion you will get the Rest in Peace-Mercy achievement. There is 3 story-related achievements you will get throughout Story mode: Helpless Observer, Explosion of Rage and Just Like Old Times. If you complete story mode in single player you'll be awarded the Revenge-No Mercy achievement. If you did the game on coop you will get Avengers. Note that you can't get both at the same time.
Some miscellaneous achievements can be earned in Story mode as well. If you complete a level with your health bar to zero you will net the Die Hard achievement. This is a bit luck-based and I wouldn't think too much about it, you might just get this without even trying. If you still don't have it after completing story mode just replay level 1 and let yourself get hit by the stage's last enemy until you have no health left and beat him. To get the Legendary Master achievement, you have to beat a stage by hitting enemies a 100 times and get hit no more than once. This one is easier done if you got a partner in coop for stage 1, beat the casual enemies while your buddy watches closely your back so you won't get hit from sideways while racking up your hit count and let him take care of the harder enemy at the end. If you don't have a partner then do the level very carefully and hit the final enemy with your special attacks (don't do this if you go for Rest in Peace-Mercy)
Step 2: Replay level 15
Now that you completed Story mode once, you can select a level. Fortunately you can get Avengers and Invincible by only completing this level without doing the campaign all over again. First, load up level 15 on easy in co-op, don't worry if you don't have anybody to control the 2nd controller as you get more than enough lives to do it without too much trouble, just keep in mind that you are now allowed to use your special skills (+). There is 4 power-up spheres in the room, each giving you 2 special attacks shots and replenishing your entire health bar, so use them sparingly. When you're done, replay level 15 a final time on hard, this could give you some trouble and you might need a few tries but it's not that hard, you just have to make good use of the power-up spheres. Personally I thought the red spheres were the best against the bosses.
Note: that if you did the story mode on coop the first time you will be able to get Revenge-No Mercy and Invincible at the same time.
Step 3: The other modes
Go to VS modes and start a game, then just wait, a round is 90 seconds and you have to wait all 90 seconds for 3 consecutive rounds to get the Almost Equal achievement. Finally go to survival mode to get the last 2 achievements. The best stage for survival is hideout, as this stage is more wide-open with better visibility. Reach wave 4, which is like a ''bonus'' wave, a train of enemies will come through the left door, put yourself in front of them and keep pressing until your meter on the upper left screen reach 5 bars, then hit the enemies with 5 consecutive power attacks ( +) to get the Just Like Bruce Lee achievement. This one can be done on Story mode too, but the lack of big group of enemies makes it much harder, here you can pretty much do it in your first try. For Survivor, you have to kill 150 enemies in survival. It is nearly impossible to do on your own, so you will need a partner for this one. Having a partner means double force, double special attacks and you won't have all enemies against you. It's very important to save your special attacks for the bosses and take the sphere that will fall in the center in wave 12 when it's utterly necessary. This is the hardest achievement in the game so take your time, use a good strategy and it's very possible to do.
[x360a would like to thank SoG Lord Kratos for this road map]