Sunlight

Some bugs and issues can only be found by playing the game for ages in a single play session, or by triggering lots of random situations. As a small studio we don't have the resources to hire a ton of people to do such tests, but luckily there is a good alternative: a fun method is to hack automated controls into the game and let the game test itself. We have used this method in both Swords & Soldiers and Awesomenauts and found a bunch of issues this way. Autotests are quite easy to build. The core idea is to let the game press random buttons automatically and leave it running for many hours. This is very simple to hack into the game. However, such a simplistic approach is also pretty ineffective: randomly pressing buttons might mean it takes ages to simply get from the menu to actual gameplay, let alone ever actually finishing any levels. It gets better if you make it a little bit smarter: increase the likelihood of pressing certain buttons, or even just automatically press ...

When we started developent of the bots for Awesomenauts , we started with the most complex part: how to do path finding and movement? When people think of path finding, they usually think of A*. This well-known standard algorithm indeed solves the finding of the path, and in games like an RTS that is all there is to it, since the path can easily be traversed. In a platformer however the step after the finding of the path is much more complex: doing actual movement over the path. Awesomenauts features a ton of different platforming mechanics, like jumps, double jumps, flying, hovering, hopping and air control. We also have moving platforms and the player can upgrade his jump height. How should an AI know which jumps it can make, how to time the jump, how much air control is needed? This turned out to be big challenge! Since there are so many potential subtleties in platforming movement, my first thought was that handling it in our behaviour trees might not be doable at all. Behaviour tr...

With the next Awesomenauts patch (patch 2.5) we will release our AI editor and enable players to load modded AIs in Custom Games. The editor is in beta right now and a surprisingly large amount of new AIs have already popped up. Other game developers can also use our AI editor for non-commercial purposes, or contact us to discuss the possibility of using our tool in a commercial product. This all makes for a great occasion to discuss how we made the AIs and what kinds of tools we have developed for this. Anyone who wants to give making AIs for Awesomenauts a try can check this little starting guide that explains the basics. I have previously discussed in two blogposts how we made the AI for Swords & Soldiers ( part 1 and part 2 ). Since then we have changed some of the fundamentals and those blogposts are well over three years old now, so I will write this blogpost assuming you didn't read them. When people think about "AI" they usually think about advanced self-l...