Let me lay down Drop7 real quickly for you:
Pieces: Discs with numbers ranging from 1 to 7, a 7x7 grid, gray numberless discs.
Objective: To get high scores and prevent pieces from reaching the top.
Rules: To make discs disappear, they must be in a row or column that has the same number of discs that's shown on the disc. For example, a 2 on top of 5 discs won't disappear. But if it happens to be right next to a solitary 3 disc. Ka-plow, goodbye 2. Any grey discs adjacent to the 2 get chipped at. Two chips and a grey disc becomes a random number disc. Every few turns, a row of grey discs pops up from underneath the playing field.
That's it. Maybe that's too flippant. “That's it” makes it sound like I'm being dismissive, but I'm trying to crystallize the game that's had me in its thrall for that last month. I've written about the beauty of numbers and math before, but the idea of Drop7 is more than that. It has that “oh, how come somebody didn't think of this before” vibe that's associated with good design.
There's no shot clock; you place discs at your leisure. Still, the grey discs and the randomness keep the game from getting too heady. It's about numbers, but not bogged down in math, really. That's something its clones, like DropSum, don't understand. For those inclined, though, there's sequence mode where the exact same discs fall every time, inviting repeat play to optimize your game.
The game has a stark post-punk minimalism in its visuals. It's simple and clean, and maybe that's why it's so easy to read into these little numbered discs. 1 is a complete bore. If you're lucky, he shows up and leaves immediately, off to another party, but beware if he gets stuck next to somebody, because he'll talk their ear off for hours. On the other hand, 7 is a great guy to have around. Dependable, and never outstays his welcome. The perfect guest. I'll admit, though, that I've taken a shining to 5. She's sexy, resourceful, a social butterfly. She's the one you end up talking to most of the night.
They're just coloured discs – I know that – but do you remember playing Tetris and cursing the Z block's unfortunate timing? Or breathing a sigh of relief after a long overdue I block pops up in the queue? My favourite puzzler, Tetris Attack, is so full of colour and character, that it doesn't allow that level of identification. Drop7's stripped down aesthetic makes for a more personal experience, oddly enough. If you've got an iWhatever, it's a must have.