Be realistic as MH pulls from a long history spanning a decade over multiple titles. This game not so much.
It sits between 2 releases with tiny additions in between from the remakes / upgrades to the 2 games.
So the roster will be nowhere as large.
While there are more than this heres an example of what exists in the game though these are from GE2 and not GE2RB. They still will be in the game though so its not as if stuff was removed. There will be other monsters from the first game as well so overall its a decent roster to keep one busy enough.
Also you can check here though if you dont want to be spoiled to what else exists in the game suggest you avoid it.
http://godeater.wikia.com/wiki/Aragami
Similar to MH lots of those monsters are "recolors" also of a base type. Also they are not listed by series I think and its been way too long for me to remember which were exactly in GE2RB.
Looking at the
JP wiki specifically for GE2: RB and counting all the types including recolors heres the general breakdown
- Small Type - 17
- Medium Type - 25
- Large Type - 41 (43 if you include 2 DLC types)
No idea if there were any others added as the listed above is just from what they had available.