How do you guys pronounce this game

[Plurrberry]

knee sees
or
ne sees
or
some other variant?

[Army of Optimists]

Technically, since it's an actual word in two languages, it should be pronounced either "neh-kes-seh" (Latin) or "ney-ches-seh" (Italian). You can hear both here[forvo.com].

That said, I tend to say it like "necessary" without the -ary.

[Koumori]

From the official FAQ:
How do you pronounce Necesse?

• The word is a play on necessity/necessary. I pronounce it like necessary, but with out the -ary. Like neh-cess.

Regardless, I prefer to use the Classical Latin pronunciation ("neh-kes-seh," as the reply above me already pointed out).

[peter sparks]

I pronounce it "NETEP"

[Onyx Wake]

Changing the name might make it more popular. The game deserves more attention.