I've always said that graphics and theme aren't essential to any good game, and McMillen really pushed it with this polarising art direction, but I remain true to my word and it doesn't stop Isaac from being one of the standout games of its generation.

Rebirth took the game further than its Flash original ever could, and we should be glad it did, as this is one of the most content-rich action roguelikes you will ever play.

Is it endlessly repayable? Well, no, but it doesn't have to be. Everything ends eventually, whether it's a credits roll or burnout, but the question is whether it left you satisfied once it's over. Even if you only played one run of Isaac, you will feel like it was worth your time - and that says it all.