Boktai 2: Solar Boy Django. You play a vampire hunter with a solar powered gun, and the gimmick is that the GBA cartridge contains a UV sensor so that you're required to go outside and use real sunlight. It's such an absurd gimmick, but it works. It works incredibly well and makes it an unforgettable experience.
The first game is alright, but the second is where the series really came into its own.
Under Night In-Birth II [Sys:Celes] - Goofy clip of the week
Street Fighter III: 3rd Strike - Friend came to visit from out of town, played some casual 3S for a little while. Also managed to rope him into trying out Waku Waku 7 and Twinkle Star Sprites as I wanted to show off some fun hidden gems in my collection.
Mahjong Soul/Riichi City/IRL mahjong - Remember when I said I was done grinding this game mode and wouldn't do another run?
Splatoon 3 - Haven't touched Salmon Run since the last Big Run. Was able to put up a 154 right away, but I know that gold target isn't actually much. Still can't kill a damn Triumvirate.