Liar Liar

Both feature an Mc who find a way to manipulate games that are to be uncheatable/unhackable.  

Both Animes have a simular plot, but are exceeded in diffrent ways that keep you tuned to the next episode, in terms of animation and voice acting i say they do a great job, both have a main male with some girls as sidecharacters and ofcourse they both play games, and keep secrets. 

While No Game No Life has a much different setting (fantasy isekai), both of these shows are all about a guy (with the help of a girl) who partakes in games where players are pit in a psychological battle of wits. Lots of layers of outmaneuvering your opponent. I think if liked the games in one show, you'd also like the other. 

Similar style. If you liked No Game No Life then Liar Liar might be for you. While not as good, the plot and the games that are played were fun to watch.  

Both anime feature similarly convoluted psychological games in an environment that pits friends or sudents against each other in a high-stakes setting. 

Both anime include solving problems, and finding or perhaps even solving your way out. Main character may not be Ayanokouji, but character has an understandable personality. 

Looking at the basis of the general story line, both have these similar key factors: -Futuristic School -Schools/Classes compete in "games" for their ranking However, as someone who thoroughly enjoyed Classroom of the Elite, watching Liar Liar is very funny to me. I don't want to spoil anything but when you watch Liar Liar after COTE, it feels like Im watching a parody version. While watching these two shows I came to realize how someone can be almost exactly the same while also being very, very different. TLDR; If you like COTE, you'll get a bit of a laugh out of Liar, Liar. 

Both anime feature a school for high stakes games where challenger students provide game rules to determine victory.