I'm normally immune to the draw of competitive leaderboard chasing. Waves was one of the few that penetrated my usually pacifist shell, leading to a few weeks of intense competition among friends. It was an elegantly designed twin-stick arena shooter, in which increasing your combo gave a temporary bomb power-up that would further increase your combo, thus granting more bombs, thus further increasing your combo, and so on.
Squid in a Box
Squid in a Box made waves with Waves back in the day, which is an annoying way of saying they released a celebrated twin-stick shooter that involved pretty particles exploding all over everything. Now they've announced a sequel, Waves: Arena Tactics, that takes the arcade shmupping of the original game and pairs it with "more of everything", including new weapons, abilities, loadout customisation, and four-player online co-op and competitive multiplayer. It's due out in 2014, and even though I've broken the first rule of internetting and told you everything before the break, you should stick around for an expectedly gorgeous first-look trailer.