It doesn't matter if it is first party or third party. It just has to be exclusive to a platform or set of platforms owned by one company. You can recommend the game for whatever reason you wish. 

For example if you are a Sony fan you might do something like this:

For Nintendo fans: Ratchet & Clank - colorful 3D platformer, awesome gameplay, fast-paced fun.

For Xbox fans: The Last Of Us - cinematic, great story, great graphics, and familiar gameplay.

For PC Gamers: Bloodborne - spiritually a souls game, awesome gameplay, great graphics, difficult.

Generation and specific platform don't matter, as long as the game is exclusive to one manufacturer.

WiiU : Bloodborne
PC: Bloodborne
Xbox: Bloodborne
:P

For wiiu-zombiu
For PS- the last of us

i think you mean from Wii U - ZombiU to other platforms.  and TLOU from PS to other platforms.

trolling - Multiplat exclusives to Wii U. XD (Fifa, COD, BF, AC, and other established multiplats that didn't come to Wii U).

from Nintendo - Xenoblade Chronicles to other consoles for the RPG fans that don't have a Nintendo console. :)

from PS4/PS3 - TLOU, Uncharted

from X1/X360 - Halo

I'm a Sony fan so I'll be reccomending from Sony's portfolio of games, did I understand right? Also does it have to be current (8th) gen or can I reccomend 7th gen games too?

For Nintendo fans: Ratchet & Clank, and Sly Cooper. Both are great 3D platformers with witty humour and great gameplay.

For Microsoft fans: Ratchet & Clank, and Sly Cooper. Both are great 3D platformers with witty humour and great gameplay.

For PC gamers: Ratchet & Clank, and Sly Cooper. Both are great 3D platformers with witty humour and great gameplay.

Teeqoz said: I'm a Sony fan so I'll be reccomending from Sony's portfolio of games, did I understand right? Also does it have to be current (8th) gen or can I reccomend 7th gen games too? For Nintendo fans: Ratchet & Clank, and Sly Cooper. Both are great 3D platformers with witty humour and great gameplay. For Microsoft fans: Ratchet & Clank, and Sly Cooper. Both are great 3D platformers with witty humour and great gameplay. For PC gamers: Ratchet & Clank, and Sly Cooper. Both are great 3D platformers with witty humour and great gameplay.

Any generation is fine. As long as the games are exclusive to a Sony platform or set of platforms (or any platform you enjoy and own, doesn't have to be sony.) It doesn't have to be a first party either (one can recommend Persona 3 -5 for example.)

To everyone non-Nintendo:

Play Super Smash Bros.

On the Ninten side. I would recommend.... Smash Bros maybe? Or MK8? Oh, Nintendo land for groups of 4 or 5! These games will bring in the local fun! x )

I got too many from Sony fans. R&C, Puppeteer, the Ico games, P4 Golden... I wish I had more time to play games....x (

From Sony perspective

Nintendo- street fighter V : it'd be nice to have a traditional fighter there that is well supported.
Or no mans sky: beautiful cell shaded exploration game
Xbox one- God of war 3: brutal and great looking hack and slash
Or uncharted 2: an all around great adventure game
Pc- Bloodborne: a great edition to pretty much any collection
Or killzone shadowfal: just a great fps to play

From Playstation's perspective (I'll try to do the others later on):

To Nintendo fans: You should definitely try games like Ratchet & Clan. Graphics are cartoony, colorful and simplistic for the most part, so you should feel right at home.

To XBox fan: You should try God of War. Those games have as many lines of dialogue and as much testosterone as the Gears game, so you will feel right at home.

To PC fans: You definitely need to try The Order 1886. Since it's basically an interactive tech demo similar to the ones you purchase on PC to boast about graphics. You'll feel right at home with this game, which is all graphics with barely any gameplay value.

I am jocking here, in case it wasn't obvious enough. Don't crucify me. I'm only going from the stereotypes perspective. =P