Guilty Gear X2: Instant Kills

All of the (regular) instant kills you can perform in Guilty Gear X2 (PS2 version).
In-game footage from Guilty Gear X2
Anime-sequences from intro and extra movie of Guilty Gear X2
Music taken from Guilty Gear X2: Reload Korean ver. soundtrack
The songs used in the video are:
0:00 - 0:52 Labyrinth of Souls (Opening)
0:55 - 3:52 Redemption (Character Select)
3:57 - 6:49 Pillars of the Underworld (Ky's Theme)
Note: This was recorded in training mode and with the CPU level dropped to zero. I didn't post this video to show off and make me look like an awesome GGX2 player - because I'm not. I just thought that all of the regular instant kills would already make a nice compilation.
This is also the reason why Roby-Ky, Cliff and Justice are missing. Because I simply didn't unlock them back in the day. ^^'
How to perform Instant Kills: In this version of the game you had to enter Instant Kill mode first by pressing all four attack buttons simultaneously (X + ▢ + ◯ + △). Then you had to enter a combination for your specific character which you could get from their move list. For most characters, this combination was two quarter circle towards your enemy, followed by high slash. For May it was two half circles towards your enemy, followed by high slash.
Newer versions of the game have very exhaustive tutorial modes, so if you are playing, let's say Xrd Revelator on PS4, you should be able to find detailed instructions in the practice mode of that game.