stuffs88
Thank You.
However, if you look at this sentence-
The proliferation of computer games designed to involve many players at once were first
developed before the widespread availability of high-speed internet connections.
Were stands to be the correct usage. But going by the meaning of it, The Proliferation cannot be the subject and I, in similar way thought The string does not makes sense with burglaries.
But, The string of burglaries is taken as the collective term, not The proliferation of computer games.
The given sentence is not correct and makes no sense at all.
The subject is the 'proliferation' (which means rapid growth) but the sentence does not talk about it at all.
'were first developed ...' is about the computer games.
If you retain proliferation as the subject, you need to completely change the sentence. e.g.
The proliferation of computer games designed to involve many players at once
was a result of widespread availability of high-speed internet connections.
or you may want to change the subject e.g.
The computer games designed to involve many players at once
were first developed before the widespread availability of high-speed internet connections.