Gauntlet vs Sky Force Anniversary
Gauntlet
Gauntlet is a 4-player cooperative (both online and on splitscreen mode) dungeon crawler that guarantees hours of dungeon crawling action for you and your friends. Since each level is randomly generated, you'll never encounter the same level twice! Not to mention, Gauntlet has a gameplay that feels a lot like Diablo 3, where you can battle hordes of enemies for shiny loot, rare Relics, which you can then use to unlock new abilities, and of course, glory. You can even play as one of four archetype characters namely Warrior, Elf, Wizard and the most unique character, Valkyrie.Overall, Gauntlet is a dungeon crawler that is incredibly fun to play with friends despite its apparent lack of a storyline. Every element of the game just seemed to come together so well after all. So, if you're a fan os dungeon crawlers and have some friends with the same interests, well, this game may just be the game you all need.
Sky Force Anniversary
Sky Force Anniversary brings Sky Force to platforms other than Android and iOS, namely PC and consoles, allowing even more players to enjoy its exhilarating arcade shooting action. It is basically similar to Sky Force 2014 on mobile and features everything you'd expect to find in the latter, including challenging enemies and bosses, large number of missions, weekly PvP tourneys, an in-depth airplane upgrade system along with a wide variety of planes to fly as and weapons to blast enemies into smithereens. In this version, you can also play the game cooperatively with a friend through the game's local multiplayer option.Oddly enough, despite its similarities to Sky Force 2014, Sky Force Anniversary is available on Android as well. Unfortunately, I'm pretty sure the game doesn't support cross-platform cooperative gameplay so you can't exactly play with your friend cooperatively if he is on the PC and you on your phone.
Sky Force Anniversary is the best (and only) version of Sky Force that you can get for Nintendo Wii, PlayStation (3, 4 and Vita), and Xbox Live, but if you want to play the game on your mobile, you can get either the Anniversary version (Android only) or the 2014 version.