Marvel Puzzle Quest: Dark Reign
12 Achievements
1,000
15-20h
The Ocho
Match an eight of a kind.
100
36.71%
How to unlock the The Ocho achievement in Marvel Puzzle Quest: Dark Reign - Definitive Guide
As you collect covers for "Sentinel of Liberty" you can convert 4 gems to yellow. Not sure how many you need before it upgrades the number.
I combined his ability with Hawkeyes "Take Aim" ability (create a Critical Tile for 5 purple) to help cut down on the need for 4+ yellows in a row.
neeker75 playing Marvel Puzzle Quest: Dark Reign
It is best to get this as early as possible since it will be much easier and you wont be overpowered. What you do is choose one of the levels in the first area. It should be the first area so you do not have any team gems in play. Second, I recommend choosing the highest level of enemies you can handle, just so you last longer.
The strategy is to get Captain America to 19 yellow gems. His special will allow you to place 3 yellow gems anywhere on the board. Now you can combine this with Hawkeye's Purple ability which will spawn one combo gem. Since combo gems use any color, you can use that in combination with Captain America's Yellow ability to get 8 gems. Remember, the last gem you place with Captain America needs to finish the chain of 8, or else you will set 7 or so off.
Black Widow is there just as a backup for her stun if you need it/have it. Just in case you are in a situation where Captain America is almost dead.
I used Thor a lot at the beginning and his yellow power will add green tiles to the board. What you could do is leave as many green tiles as possible before using his yellow power, and/or you could save up enough AP to use his yellow power 2 or even 3 times. 3 is probably overkill though. 1 or 2 should be enough once you have collected a few yellow covers to increase the amount of green tiles the power creates. The first few battles after the tutorial also don't have team-up titles which can increase the odds of getting it.
This should unlock through regular gameplay as you go through the story mode. While this is a Match-Three game, matching more of the same colored tiles in a row or column of four or five, or criss-crossing of five or more causes extra damage, generates more points, clears rows and/or columns, and creates a critical tile that if matched by either team causes damage to their opponents. There's an element of luck and the random way of how tiles are created and dropped into the board, but just create a crossing match of colored tiles that includes eight of the same color to get this achievement as you play through the battles.