In celebration of the 2-year anniversary of his first release on XBIG (JoyJoy), radiangames is discounting all of his releases across all platforms, including all of the XBIG games back down to $1 (where most of them started out and were subsequently raised to $5 at one point until today).
Here's a link to his blog post about it that contains links for each game available for purchase on the relevant platforms. My personal favorites are Inferno / Inferno+, Crossfire / Crossfire 2 / Super Crossfire, and Ballistic / Ballistic SE, but I've enjoyed almost all of them really (Slydris does nothing for me personally even though as a rule I do like puzzle games and also note I haven't played any of the iOS releases given I don't have an iPhone or iPad, so I can't personally say anything about how well they control with touch controls
).
Here's a link to his blog post about it that contains links for each game available for purchase on the relevant platforms. My personal favorites are Inferno / Inferno+, Crossfire / Crossfire 2 / Super Crossfire, and Ballistic / Ballistic SE, but I've enjoyed almost all of them really (Slydris does nothing for me personally even though as a rule I do like puzzle games and also note I haven't played any of the iOS releases given I don't have an iPhone or iPad, so I can't personally say anything about how well they control with touch controls