Summary: Very little game that gives you way more fun-moments than most big titles. You keep replaying it and it never gets boring. It's very hard and you need a lot of practice. Not that that is a problem.
Summary: Binding of isaac already had massive replay value and this just pushes it to the extreme. 3$ for 70% more content including 25 new bosses and mini-bosses, over 100 new items, a new floor type for every existing floor type plus a bonus floor, a whole bunch of new enemies, new rooms, and so much more.
Summary: If you thought you had mastered Isaac, think again. For $3, the whole formula gets a total revamp. More of everything, and the creepy dial gets turned all the way to 11. Not recommended for newbies. Finish the vanilla game first, and if you want more, come back for the Wrath.
Summary: This is one of the best dlc's I've ever had for a game, it actually changes the way you play! Overall the game is more difficult than before but why would a newbie buy it before the original? The game for me before was way too easy after killing mom after the 10th time (I've kill mom's heart 28 times). The items are fresh and the soundtrack's still fits perfectly + challenges are fun/hard. For $3 you get a new game basically.
Summary: Great game, great DLC. I'm really amazed how such a little game can give more fun than big titles. This DLC add lots of content to the game, which means more hours of gameplay and higher replayability. There are some bugs in this DLC, but come on, that's an indie developer.
Summary: Unfortunately this DLC has bugs galore, along with some questionable design issues. Firstly, the first few floors are unreasonably difficult, even for Isaac. I realize that the game is new, and familiarity will quell this issue, partially, but even still, some of the enemies that are available in the first floor are ridiculous. This goes with one of the new bosses as well, although the other boss is much easier. The endgame, however, is much easier than it's ever been.
Summary: If you already own the Binding of Isaac, why not buy this? Its cheep and adds tons to the game. New challenges, new items, new enemies will continue to do what this game does best: kick your ass. The only reason this scores a 9 and not a 10, is the fact that the difficulty might be just a bit too hard. Difficulty is one of the appeals of the game, however much like Ed McMillen's other game, Super Meat Boy, Isaac slowly ramps up the difficulty.
Summary: The Binding of Isaac, containing randomly-generated dungeons to explore with an insurmountable combination of bosses and enemies, made for a near-infinitely replayable game. The Wrath of the Lamb, being only $3.00, takes that to its extreme, making the deepest parts of the game darker, and the hardest parts even more difficult. You may have mastered The Binding of Isaac, but there's more to come in this low-cost, high-content addition to the game.
Summary: If you loved The Binding of Isaac, don't even hesitate before buying this. It adds more of everything, and is especially great for those that already 100% cleared the game. It is a tad buggy, but not enough to ruin the experience.