Yes, Inferno 2 has MFi controller support!
Inferno 2 on iOS does support controllers and is compatible with the MFI standard.
The ultimate twin-stick action-RPG/shooter is here! Inferno 2 is the sequel to Inferno , Radiangames' critically-acclaimed twin-stick action-RPG. Inferno 2 boasts even more devious levels, more weapons, more upgrades and powers, more enemies, and more customization, along with more insane explosions and particle effects.
BIGGER, BETTER, BADDER! Inferno 2 is everything Inferno fans have been waiting for: * Play through 80 levels of atmospheric awesomeness for hours of gameplay! * An all-new arsenal of weapons and extensive upgrade system! * Responsive and customizable touch controls * 3 difficulty levels * New Game mode adds even more replayability, challenge, and variety * Over 50 enemy types * All-new special level types and goals * Tons of secrets to discover * All-new soundtrack! * GameCenter achievements.
Inferno 2 supports MFi controllers.