Good morning.
Quick rundown of killer instinct titles.
Back in the day, you had killer instinct 1, killer instinct 2 and killer instinct gold, these are the older killer instinct titles.
The new one is an exclusive pc and xbox one title, it's also available on steam since a few months.
The different season resemble character packs which were released for the new ki, it started as a free game with characters you could purchase, there were 3 seasons of characters till now.
You can also get a definitive edition, which holds all 3 character seasons pluss two aditional ones.
Personally speaking, I like the new ki the most out of the bunch, it hits quite hard, literally, it has an awesome gameplay feeling, and the soundtrack makes it a hundred times better, as long as you are a fan of metal and electro beats.
Greetings Moritz.
Hail the unholy church of Satan, go share it's greatness.