The whole industry and gaming community is singing praises to Astro Bot right now, and for a good reason. It's a game that only comes once in a while and shows everyone what happens when you love what you do, and have the means to share it with others.
One of the many features that people are highlighting, are the "easter egg" bots. Along the course of the game, you keep saving various astro bots, and while many of them use the generic astro model, many others are quite overt references to the history of PlayStation games.
Naturally, it also includes such franchises as Tekken, Street Fighter, and Guilty Gear, which is a bit of a pleasant surprise for a series that was more niche than the two mastodons it sits alongside of.
Tekken even gets a cool little scene with the iconic Kazuya vs Heihachi family rivarly.