I have memorized the feeling of V-I, but not so much the others. I look for patterns, ie. which chords are the same, and which do I need to tell the difference between. I mostly listen to the type of chord to help with the process of elimination. Then I sing the bass notes in my head to see if it fits. But I will admit, I do use the cheat bass lines a lot if I'm not sure, but only after I've made my best guess.
(By the way, I'm assuming you're talking about Route VI, and there isn't another game called Route IV).

Yes, if you memorize the feeling of I-IV, I-V and are able to differentiate maj/min/dim route IV is much easier. With this technique I maxed out the human-made levels (up to 160) in a few months.

An alternate, more advanced approach to all of the chord games (chord inversions, chord names, or chord progressions) is to listen to each interval that makes up the chord and analyze it. This is more efficient and useful, though much harder to develop. @Dima G and @Mark Tomato Alley are at extremely high levels of mastery in the Olympics (basically chord skills testing) and they both advocate this approach. The concept is that you can sing the individual chord tones and then analyze them.

@Benjamin Jack Are the levels beyond 160 algorithm-generated? How difficult do you find those levels?

@John Huang Not very difficult. They just get boring (I can get them right if I spend the time but I do not learn anything doing it), currently I am working on hearing the individual notes of chords in chordelius and Olympics. Once I can hear those I hope to begin more intense Route VI training

Hey, @Benjamin Jack, I laughed about the extreme level of mastery 😁 But yeah, I've improved a lot over the past year and I'm still improving a lot every day.

I would say the same as you, I think it's a good approach to blend two techniques: hearing each note individually, as well as hearing the feeling of the chords (the chord qualities). Hearing how it feels make you recognize things more instinctively, more as the result of an emotion, and maybe faster. But on the other hand, hearing individual notes is what you need for precision and to double check your answers, and helps you avoid letting laziness slip into your practice.

@Mark Tomato Alley extreme level of mastery at a useless skill of smashing the right keyboard shortcuts as fast as possible 😅

i find that hearing the bass note is the most important thing. i don't know why the exercise is structured so that you would only hear it when you use the hint, it should be the first stage of acquiring what the chords feel like, bass is extremely important there. i practiced in other apps that play bass very prominently. the next step after that is to be able to sing the bass note even if you can't hear it.

@Dima G 😂👍

Such a great input guys! Really appreciate it!
Have a great week y’all!

I have a few strategies there.

Absolutely listen for those strong cadences - ii V I, IV V I, etc. I also listen straight out of the gate for what “types” of chords am I hear Major, minor, diminished? I usually have my answer by then, but if I’m not certain, I will use my ear (made awesome by ToneGym’s interval training games) and hum the bass line for the progression.

If all else fails, you always have the life preserver to check the bass line before you choose a final answer