Killer Instinct

This Achievement requires that you unlock an additional colour for TJ Combo. The first colour unlocks at level 3.

I found that the achievement didn't pop when I unlocked the colour. If this happens to you, hard reset your console (hold the power button down for ten seconds, then wait a minute and press it again). You then need to unlock another colour for TJ Combo for the chievo to unlock.

Others have suggested turning your console to offline mode, deleting your save, then unlocking a colour and turning it back to online mode, but I haven't personally tried that method.

TJ Combo earns a new color after lvl 3. You'll get enough XP for this while passively playing 200 matches. Idling is good enough for this achievement, but you will earn it faster while going for 10 survival wins.