Duration: 10:01

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The last three levels of Ripton. Screen H is certainly the hardest of the three (and thus one of the hardest Repton 1 levels ever). The level is set up so that very little can be disturbed before taking the key without trapping a safe; but there are two monsters that must somehow be killed. In the video I show the best way I have found to achieve this, which is still very tough to pull off. In between the two mandatory monsters I kill one optional one; here I use the fact that Ripton (like Repton 2) allows you to walk through a cracked egg. This is not at all essential, since you can let the egg fall and wait for the monster to come back up, or just leave this monster till later; my purpose in killing it now is to open up another possible way to kill the third and toughest monster just in case the method shown in the video goes wrong. At the very end of the level, I use a "skull shuffle" to avoid having to Repton shuffle four rocks before an egg hatches.

Screen I is, in fact, a breather level in comparison to the two on either side, though it does start with a nasty wake-up call: you have to avoid an egg that starts off just above you, and push the rock falling above the egg away to avoid it trapping a safe. This, however, is not too hard since there is no tricky timing: you just have to move right then left immediately as the level opens. The only other hard parts are the two-column Repton shuffle of 16 rocks and the final monster. This monster may seem impossible to get past, due to his preference for horizontal motion, but this very preference can be used against him by leaving one diamond before challenging him, as shown.

Finally, Screen J, which I have recorded before, but this is a maximum-score playthrough, in which this level becomes quite different and is worth showing again. The top puzzle is little changed, except that you have to remember you can get one more earth square by pushing one rock across to join the clump in the top-right. I could not remember my old solution to this section perfectly and had to re-solve it from scratch; this is why the solution shown lets the monster live, not a deliberate choice. Then, to get maximum earth in the bottom corner with its twenty eggs, there are two main methods. One is to repeatedly kill monsters with eggs so there is only ever one monster active; this takes more time, but can just about be done within the level's time limit. However, it is also pretty easy to slip up with that method, which is why for the video I have gone for the "refuge in audacity" method. Note that Ripton, unlike the original Repton, stops play after the last level.

The music for this video is a medley of "The Easy Winners", "Elite Syncopations" and "Felicity Rag" by Scott Joplin.