This one was quite a surprise. The game is a RPG where the aim is to obtain and evolve your weapons to make progress in the game. You start off with a catcher gun that is used on monsters to catch them. These monsters can then be fed into your normal weapons to power them up. Feed enough of them into the weapon and you can evolve it into something more powerful. You can also increase the base power of the weapon by simply killing monsters with it. Both of these things were right up my street and allowed me to do lots of grinding to become pretty OP very early on.
The combat system has you gunning down monsters but you can't just fire a constant stream of bullets. You have a power bar that is pretty much a stamina bar. Each of your weapons has it's own bar and so it's beneficial to carry a few with you so you can swap on the fly when you need to recover stamina for a weapon. Monsters respawn when you exit and re-enter an area. This makes for some fast exp farming if you can find an area that suits you.
The story is a bit of a mess and isn't helped by the fact that the translation is all over the place. You essentially work with a demon to try and obtain the ultimate weapon. You clear an area, go back to see the demon and a new area will unlock. You just need to work your way through each of the stages, take on bosses and see the ending. The fun is in finding new weapons, grinding exp and then evolving them to see what you get.
It was great coming across a game like this. It's one I've never heard of, it's a breezy RPG at around 5 hours long and it offered a nice change from all the fighting games that are in this collection.