For me, when it comes to games, or indie games more specifically, there has to be a certain characteristic about them that make them worth playing over and over again. More specifically when we're talking about roguelike dungeon crawlers like
Diehard Dungeon, the game has to be exciting enough to put the amount of hours into the game that it allows.
Yes, you heard me correctly, Diehard Dungeon is yet another roguelike dungeon crawlers that has got quite a bit of playtime out of me. You play as a character with a sword and a chest following you around at all times. The gameplay style is very reminiscent of Binding of Isaac in the sense that it is a top down, 3D'esque dungeon crawler where you go around and kill mobs, but that's not all it offers.
You have chances of finding treasure chests and treasure rooms where you can "roll" for a chance for something good. But, if you get too greedy and want to get more out of the "roll", enemies will spawn and you'll have to face them to move on. It's rather interesting to add a concept like that, because in most roguelike dungeon crawlers, greed is the biggest weakness. You want more as quickly as possible, but sometimes, it can have it's negative outcomes.
The combat system is pretty simple. You have a sword. Can't get much more simple than that. The only thing that could differentiate this game from any other dungeon crawlers is how difficult it actually is. I've found myself dying multiple times on the first floor. You have a choice at the beginning of your run to go to the upper floor or lower floors, and each time, the difficulty curve is changed between the two floors, but that doesn't necessarily mean either/or is going to be easier than the more difficult floor. Obviously, choosing the more difficult floor at the beginning of your run will allow you to find more treasure and loot, but at the cost of losing all your health and dying quickly. You have to keep those types of things in mind.
Onto my favorite part, the graphics. As I mentioned before, it does have a bit of 3D'esque style graphics, but it's also mixed with pixelated graphics that suit the game really nicely. There's a lot of games out there that will try the pixelated graphics in a way that doesn't really work for the game, but in this games case, it works wonderfully:
It's definitely got the old school feel to it without it being too old school.
Recently I haven't been playing this game as much as I like to, but when it comes to rogue like games, this one is definitely top notch.