It's a good day for retro gamers, with two mouthwatering re-releases hitting the news. First up, Sega has released an iPhone version of legendary scrolling shooter Gunstar Heroes. The original Megadrive title, developed by shoot-'em-up master, Treasure, has apparently been faithfully converted, with the addition of Bluetooth multiplayer. It's a typically frenetic and uncompromising 16bit blaster with an interesting customisable weapon system and basic melee combat, and it'll set you back £1.79.

Elsewhere, retro games specialist Tozai Games, has just launched a 're-imagining' of the seminal 1983 platformer, Spelunker, on PSN in the States.

Originally devised by lone coder Tim Martin, the game became a hit in Japan in 1985 when Irem released a Famicom version. The action takes place in a huge cave hiding a valuable artifact in its deepest reaches – determined to recover the treasure, the player uses bombs and flares to disperse barriers and enemies, which include bats with posionous droppings. The game was, like many early platform titles, insanely difficult at times, with many a 'leap of faith' moment – usually ending in death. The remake, which boasts 3D graphics, 100 new levels, and multiplayer modes, was originally released in Japan, but the appearance of a US version suggests a European release won't be far away.

Then, of course, it will be PSN Chuckie Egg...