Okay so, before we begin, I have read a few comments regarding the Arc Client. I am not sure how much of it is gamers not wanting to install extra clients on their machines (see: Origin, Uplay, and so forth) or whether there is an actual, legitimate complaint against this one. Privacy concerns were mentioned a couple of times, but spoken in a vague and general tone. The service normally deals with free-to-play titles, like Star Trek: Online, Blacklight: Retribution, and APB: Reloaded.
Now on to the announcement: if claimed before November 30th, you can receive Torchlight for free; you may also purchase the sequel for $5. Both of these prices are a $15 reduction (the original is regularly $15 and Torchlight II is normally $20). By now, it is a little old, being released in late 2009, but it has a dedicated following. It was also available for free last year from GoG, which is obviously a better option. I mean, no offense to Arc, but it is really hard to beat free software that is also completely DRM-free.