Many people have asked if there are similar games to The Saint's Tomb. Apart from my other games, A Miner Problem, Beyond the Vale of Madness, and 5e Arena, there are some other games that might scratch the same itch as this one.

First, you can go with some games that are directly inspired by The Saint's Tomb.  A Long Rest by JW Allen and The Restless Ghost by DragonZaid are short 5e HTML games that used my game as their basis. If you've played my games you should feel right at home.

Second, you could go the PDF route.  The Death Knight's Squire and it sequels are great and worth the price.  If you've played Beyond the Vale of Madness, you're already familiar with JC Connors. With his permission, I adapted that game from his website; if you'd like to play another of his creations, The Dragon's Demise is also available for free. I supported Wizard of the High Tower as a kickstarter and have played through it. It's very good, and more focused on combat than some of the others here.

Speaking of Kickstarter, there's one last project I'd like to draw your attention to. RPG Wanderer is a website that is creating high production value solo adventures. They've released the first chapter of their adventure "Tides of Murkport" for free. The music, the art and the writing are all top-notch (see the illustration on this post), but all this costs money to make.  So, they're asking for supporters on Kickstarter to write and produce additional chapters. I'm planning on throwing in my support and if you enjoy solo 5e adventures, you should think about it too.