Between Last Resort and Blazing Star you have the best the Neo can ofer on horis.
Strikers 1945+ is still the better vert shmup the Neo has to offer, it doesnt necessarily say much about the genre on the Neo but other than that you got Aero Fighters 2.
The thread's title says shooter so in that case here is the shooters on the Neo that I frequent the most other than the ones I already mentioned. I do own some other shooters but truth be told I just don't play them as much as these.
Metal Slug 3
Metal Slug X
Metal Slug 1
Shock Troopers
Nam '75
Twinkle Star Sprites
Viewpoint
Zed Blade
Pulstar
Prehistoric Isle 2 (I almost forgot, good game!)
Honorary mentiopn to Andro Dunos and ASOII, everytime I play either is quite an experience, however AD is too damn hard and ASOII's system is a bit of a let down for what could have been an amazing game, I really love the bosses on that one.