Sony's page for it doesn't help much, so here goes.
Also, this instant game doo whap. Anyone got a link that sums up the whole service?
PlayStation Plus, £40 per year (also available in 3 month chunks)
There are always 12 games in the Instant Game Collection(IGC).
The games change at differing rates, but you usually get 2 or 3 news games per month.
Some games are in the IGC for the whole twelve months, some for just a month.
The best thing to do each month is go to the Sony Entertainment Network website and add any new games to your download queue by going through the checkout process with them. They won't actually download (unless you use the new schedule do-dah) but they will be in your download list, which means that you will then be able to download them at any time during your subscription, even after they've left the IGC.
This page lists the current IGC titles
Motorstorm, LBP 2 and Infamous 2 are the long terms titles.
PlayStation Plus also gets you discounts on games, and usually an extra 10% off anything that is in a sale.
It also enables auto patch downloads and installation and cloud saves etc.
When your subscription ends, access to the games ends, when you resume, access resumes for the same point.
If you forget to add a title to your download list and it leaves the store - tough cheddar, its gone.
Edited by X201 at 15:50:11 04-05-2013