Branelings
This was a game I briefly worked on about summoning extradimensional entities and splicing them together in the name of Mad Science.
It was going to function kind of like a cooking game, where you received orders for extradimensional lifeforms with particular properties, and you had to use the machinery in your lab to summon the prerequisite creatures and then combine them to yield the target, with potentially disastrous pitfalls along the way.
I still think it's a really cool idea, but I was working other jobs at the time and "real life" got in the way.
Here's a compilation of its development: