Examples of single player games that use modern ML techniques in the AI? Are there any examples of single player games that use modern ML technique in its games? By this I mean AI that plays with or against the human player, and not just play the game by itself (like Atari).
&quot;Modern ML techniques&quot; is a vague term, but for example, Neural Networks, Reinforcement Learning, or probabilistic methods. Basically anything that goes above and beyond traditional search methods that most games use nowadays.
Ideally, the AI would be:

widely available (i.e. not like the OpenAI Five, which was only available for a limited amount of time and requires a high amount of computational power)
human level (not overpowered)

Ideally, the game would be:

symmetrical (the AI has the same agent capabilities as the player, though answers similar to The Director would be very interesting as well)
&quot;complex environment&quot; (more complex than, say, a board game, but a CIV5 game might work)

But any answer would be appreciated, as some of the criteria above are quite vauge.
Edit: the ideal cases listed above are not meant to discourage other answers, nor are they intended to be of strictly inclusionary (ie: any game would need to satisfy all of the above requirements)
There is Google Research Football, which is an open-source platform to develop reinforcement learning algorithms to play a game similar to FIFA or PES, although the football simulation is not as realistic as the current versions of FIFA or PES. You can play this game against different RL agents (e.g. DQN or IMPALA) and, of course, you can even develop your own RL agents and play against them. Here is a video that illustrates the environment. Here is the code and instructions to use it.
As far as I know, there isn't yet an AI that plays simulated football at a human-level (i.e. as good as the best human players). For example, I can regularly (although not always) beat the legendary level-AI at FIFA, but I also don't know the details about this AI (which could also be rule-based).