Yeah, I bought Rotastic for $1.99 with $2 credit, used the credit to get The Cave for $1.75 then used the credit from that to get Sniper Elite (original) for 99¢ and still have $2 credit.
Not too shabby. You have to search to go to Sniper Elite directly; it's on sale for 70% off but it's not part of the Sniper Elite V2 page.
Oh, and the Spiral Groove bundle is a much better deal for Sniper Elite V2 if you want it. You can buy the DLC from GMG and daisy chain the $2 credits to get most of it for very cheap. I think the total for the base game and all DLC is something like $10 rather than $18 for the GMG bundle.
Edited, Jul 2nd 2013 10:50pm by Jophiel