The Binding of Isaac: Rebirth

Started playing it, thought "huh this isn't so bad"
Wasn't until like floor 5 or 6 before I realized what was going on.

I'm now on floor 53. I have pretty much every item available to me at this point in the game.

I've made absolutely no progress whatsoever thanks to this seed, but it is a very, very good way of finding out what some of the new items do, and discovering item combinations.

Sounds like it would be a good seed to use if you were looking for those last few items to finish out the Platinum God achievement... not that anyone will be anywhere close to achieving it any time soon though, lol.