Shoot ’em ups, being one of the oldest genres of gaming there is, have been a pretty constant presence in every major generation of gaming hardware.
The early years of the 21st century were no exception, offering us a wide variety of top-notch shoot ’em ups of all types, including bullet hell, traditional side-scrollers, vertical scrollers and full 3D efforts.
Psyvariar by Success Corporation, a company today primarily known for its Cotton series and puzzle game Zoo Keeper, is a particularly solid example with some interesting mechanics, and a game that remains eminently playable today.