How to Download Hydra Slayer

1. Click on the Hydra Slayer download button below.
2. Choose "Install" to install the game on the windows steam client.
3. Follow the on-screen prompts
4. Let it download the Full Version.
5. Once a game is downloaded, use the Windows Steam Client to play the game.

=== Download Game ====

Download for pc →

This guide describes how to use Steam Proton to play and run Windows games on your Linux computer. Some games may not work or may break because Steam Proton is still at a very early stage.

1. Activating Steam Proton for Linux:
Proton is integrated into the Steam Client with "Steam Play." To activate proton, go into your steam client and click on Steam in the upper right corner. Then click on settings to open a new window. From here, click on the Steam Play button at the bottom of the panel. Click "Enable Steam Play for Supported Titles."

Alternatively: Go to Steam > Settings > Steam Play and turn on the "Enable Steam Play for Supported Titles" option.

Valve has tested and fixed some Steam titles and you will now be able to play most of them. However, if you want to go further and play titles that even Valve hasn't tested, toggle the "Enable Steam Play for all titles" option.

2. Choose a version
You should use the Steam Proton version recommended by Steam: 3.7-8. This is the most stable version of Steam Proton at the moment.

3. Restart your Steam
After you have successfully activated Steam Proton, click "OK" and Steam will ask you to restart it for the changes to take effect. Restart it. Your computer will now play all of steam's whitelisted games seamlessly.

4. Launch Stardew Valley on Linux:
Before you can use Steam Proton, you must first download the Stardew Valley Windows game from Steam. When you download Stardew Valley for the first time, you will notice that the download size is slightly larger than the size of the game.
This happens because Steam will download your chosen Steam Proton version with this game as well. After the download is complete, simply click the "Play" button.

Windows Pc Requirements

Minimum:

• OS: Windows XP
  
• Processor: 0.5 GHz
  
• Memory: 512 MB RAM
  
• Storage: 200 MB available space

Recommended:

• OS: Windows XP
  
• Processor: 1.5 GHz
  
• Memory: 512 MB RAM
  
• Storage: 250 MB available space

Linux Requirements

Minimum:

• OS: any
  
• Processor: 0.5 GHz
  
• Memory: 512 MB RAM
  
• Storage: 200 MB available space

Recommended:

• OS: any
  
• Processor: 1.5 GHz
  
• Memory: 512 MB RAM
  
• Storage: 250 MB available space

Mac Requirements

Minimum:

• OS: OSX 10.7 64-bit
  
• Processor: 1.5 GHz
  
• Memory: 512 MB RAM
  
• Storage: 200 MB available space

Recommended:

• OS: OSX 10.7 64-bit
  
• Processor: 1.5 GHz
  
• Memory: 512 MB RAM
  
• Storage: 250 MB available space

roguelike based on mathematical puzzles

You are facing a nine-headed hydra. Your flaming longsword cuts five heads in each swipe (no more, no less), which will kill a five-headed hydra, but a larger one will regrow two heads after each swipe. Your storm scythe cuts exactly seven heads, but it makes ten heads grow back if the hydra is not dead. Is it possible to kill the hydra? What if you also had a silver dagger, which cuts just one head, but makes five heads grow back?

Solution: It is impossible without the silver dagger (the number of heads always stays divisible by 3), but possible with the silver dagger, for example: 9 -> longsword -> 6 -> longsword -> 3 -> dagger -> 7 -> scythe -> 0.

If you liked this puzzle, and you also like dungeon crawling, Hydra Slayer is for you!

Hydra Slayer is a roguelike (randomly generated dungeon crawler), with unique combat mechanics based on the puzzle above. It is challenging both at a short term tactical level (each hydra is a unique challenge, bumping into it with your weapon almost never works), and at a long term strategy level (you have to build a set of weapons which slays hydras effectively). While the early levels could be used to teach arithmetics and tactical planning in a fun way, building an effective set of weapons for late levels is a challenge even for expert number theorists!

Hydra Slayer currently features a tutorial, 5 player character races with distinct characteristics, 28 enemy types (10 common hydras, each in two varieties, and 8 special enemies), 28 types of equipment including rare artifact weapons with special properties (not counting material and size variations), 15 weapon materials, 18 types of magical items which help you in your quests, three game geometries to choose from, 8 level topologies on very deep levels (including the Möbius strip and Klein bottle), 11 level generators, and two endings (a small victory for quick challenges and more casual players, and a big victory for those who want more challenge).

Hydra Slayer is available for free from its website. By buying the Steam version, you get typical Steam features, and more frequent updates -- currently, the Steam version has the following bonus features:

• online achievements and leaderboards
  
• Steam trading cards
  
• cloud-based saves
  
• daily challenge
  
• automatic updates
  
• a "challenge" mode for short but very interesting games (much more unpredictable than the normal play)
  
• updated interface and performance (watch those heads fly!)
  
• new music
  
• traps to lead hydras on
  
• Orbs which provide a powder/potion effect many times at the cost of a weapon slot
  
• source code (except the Steam features)

“Difficult, but worth it. Great game! Very unique and interesting mechanics. Definitely not for the faint of heart (or mind).”
5 stars – Google Play

“OK, it's probably not number theory, but it is awesome. Thanks for releasing the source (so I can run it on Linux). I'm on my third game, the first game consisting of me dying before I could properly see what I was doing.”
CGGreatHouse, MyMathForums

“Also you know you're playing a funny game when you make your opponent stronger so he's easier to kill.”
BDR, Attnam IRC channel