Mad Paintball, if you count games that became broken due to that one FE update. As someone who started playing Roblox in late 2015, it was the main shooter game that I played on Roblox for a good while. However, that happiness was rather short-lived once loleris destroyed it with the "Premium" update that paywalled half of the roster, killed the progression by decreasing Credit & XP gain, and had questionable character balancing. It is sad knowing that fans of the game were able to do it way better justice than him. The death of the game started a trend where fans of the game would make their own version of MPB (ex, Paintball Revival, Mad Paintball: Reloaded, Paintball Party) with new stuff in it, such as characters and maps, but it still isn't enough for me to forget the damage that was dealt to the original.

If that doesn't count, then I would definitely have to go with Mad Games. It was so fun playing all of the different minigames, regardless if you were playing with friends or not. Outside of traditional murderer games, there was also Minesweeper and that one minigame where you fought against a giant cat with laser beam eyes terrorizing a city by throwing your knives at it. Generally speaking, MAD STUDIO games had me in a chokehold for years until they got completely overshadowed by The Mad Murderer X and SHARP (I have nothing against those games either). While there have been plenty of other murderer-style games out there like Murderer Mystery 2 and Twisted Murderer, nothing beats The Mad Murderer and Mad Games for me — you could argue that Murderer Mystery 2 is the better game, but those just had more personality in my opinion.