Other than the Resistance series, Insomniac Games hasn't really got a very good reputation (okay, the original Spyro games, but they gave that franchise away). I prefer Naughty Dog now.

^^(ratchet and clank) i like insomniac more since naughty dog had a had habbbit of only making one game series per console. and not to mention naughty dog gave away crash bandicoot

I used to play allot of games from both company's when i was younger, though ill go with the Insomniac games since they were the ones that released Spyro. <3

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Absolutely evil to make me decide between 2 of my favourite gaming companies!
So I wont choose.... but what I like about Naughty Dog is that they really are pushing forward with their new titles which are all consistently great games, they aren't going backwards like some companies (looking forward to The Last Of Us soooo much).
And what I like about Insomniac is that some of their gaming franchises are my favourites of all time :)