/genres return the following array:
[
{ id: 4, name: 'Fighting' },
{ id: 5, name: 'Shooter' },
{ id: 7, name: 'Music' },
{ id: 8, name: 'Platform' },
{ id: 9, name: 'Puzzle' },
{ id: 10, name: 'Racing' },
{ id: 11, name: 'Real Time Strategy (RTS)' },
{ id: 12, name: 'Role-playing (RPG)' },
{ id: 13, name: 'Simulator' },
{ id: 14, name: 'Sport' }
]

containing only 10 genres but many /games have genre ids that are not listed in said endpoint.

for example 15 & 32 : Strategy & Indie and some more