- Estimated achievement difficulty: 3/10 [Achievement Difficulty Rating]
- Offline: 12 
- Approximate amount of time to 1000: 1-2 Hours [Estimated Time to 100%]
- Minimum number of playthroughs needed: 3
- Missable achievements: None
- Does difficulty affect achievements: No
- Unobtainable/glitched achievements: None [See Note*]
- Extra equipment needed: None
*All ACA games have a tendency to not unlock random achievements. If this happens, just hard reset your Xbox and attempt again and it should unlock
Alpha Mission II was released on NEOGEO back in 1991 by SNK, and has been ported directly to the Xbox One by our new best friends over at the bizarrely named Hamster Corporation. As with most of the other games so far released in the ACA series, this vertical scrolling shoot 'em up is a pretty fast completion, requiring little skill to finish. You only need to play each game mode once, but depending on luck and how fast you get learn the enemies patterns and game mechanics, may take few more tries.
Step 1 - Original Mode
Start up in original mode. You can change the settings to make things easier for yourself by pressing and changing the difficulty to 1, and changing the number of players to as high as you like. You can go as high as 99, but will probably only need 20-30 max to get to the highest score needed. Play until you have all of the point achievements, getting to grips with the game as you go. Once you have them, let yourself get beat and unlock the two high score achievements. 5 achievements for 420.
Step 2 - Hi-Score Mode
In Hi-Score Mode, you have to test yourself against the computer at level 4 difficulty, with only three lives to play with. The trick to getting to a high score is to learn where the enemies come and where the powerups are, and how to use them. Concentrate on your ship and incoming bullets and ships, not necessarily what you are aiming at. For more in depth advice, see the guide. Once you have the score related achievements, let yourself get beat and upload your score for the related achievement. 4 achievements for 340.
Step 3 - Caravan Mode
Rinse and repeat what you did in step 2, this time in Caravan mode. As well as not being able to change the difficulty and having only three lives, you have only 5 minutes to get the high scores. However, this should be plenty of time in this game, using the same tactics as Hi Score mode. Once you have the score related achievements, you can simply quit out. 3 achievements for 240
This is a great old school vertical scrolling shooter, which is a classic "one more try" type of game. With a little practice, the achievements should come pretty fast. If you don't mind the price point for not much bang for your buck, and appreciate an easy 1000, then this game comes highly recommended!
[XBA would like to thank Corrupt. for this Roadmap]