A whole bunch of top-notch iOS games are available for a buck right now - possibly as part of some upcoming Apple promotion.

Highlights include Terry Cavnagh's ultra-tough, gravity-flipping sci-fi adventure VVVVVV; zig-zagging ribbon weaving puzzler Strata; and Nitrome's absurdly creative glacier chopper Icebreaker: A Viking Voyage.

Plus, a handful of twitchy just-one-more-go games are on sale, like Impossible Road, Boson X, and Wave Wave.

Here's what we've seen so far. We'll update the story if more games go on sale, or if we find out why a bunch of great games have mysteriously gone cheap at the same time.

Rayman Fiesta Run - 69p / 99c
Boson X - 69p / 99c
Strata - 69p / 99c
LEGO Lord of the Rings - 69p / 99c
Icebreaker: A Viking Voyage - Free
Wave Wave - 69p / 99c
LYNE - 69p / 99c
VVVVVV - 69p / 99c
Feed Me Oil 2 - 69p / 99c
Impossible Road - 69p / 99c
Intake: Be Aggressive (iPad only) - 69p / 99c
99 Bricks Wizard Academy - 69p / 99c
Glorkian Warrior: Trials of Glork - 69p / 99c
Oscura Second Shadow - 69p / 99c
Table Tennis Touch - 69p / 99c