Recently the question was raised, which are the most followed scratchers. A similar question could be asked for the most popular projects. Here my suggestions:

#1. Paper Minecraft v11.3, by @griffpatch: 118685❤
#2. Geometry Dash v1.5, by @griffpatch: 71392❤
#3. Scratcharia v2.8.3, by @griffpatch: 35562❤
#4. Epic Ninja v1.12, by @griffpatch: 25093❤
#5. Hill Climb Racing v0.10b, by griffpatch: 24282❤
#6. Scratchnapped, by @griffpatch: 23975❤
#7. slither.io v1.8, by @griffpatch: 23647❤
#8. The Ninja, by @Will_Wam: 21505❤
#9. Griffpatch's 3D Laser Tag v0.7-2, by @griffpatch: 20744❤
#10. FIFA 16 - Mini FUT:, by @Maszek: 19470❤
#11. Super Mario Brothers (1s1s), by @BoltBait: 19090❤
#12. Cloud Platformer Multiplayer Fun v1.21, by @griffpatch: 18941❤
#13. Pokemon GO! (Alpha v0.5), by @JH-Games: 18845❤
#14. Agar.io v1.1d, by @griffpatch: 18137❤
#15. The Ninja 5, by @Will_Wam: 18076❤
#16. Oreo!!!, by @FunnyAnimatorJimTV: 17866❤
#17. The Ninja 3, by @Will_Wam: 17708❤
#18. Snail Platformer v1.3, by @griffpatch: 16758❤
#19. the Ninja 4, 3 by @Will_Wam: 16330❤
#20. Whale, by @NickyNouse: 16288❤
#21. Sushi Platformer, by @key01134: 16105❤
#22. Jumper (Platformer), by @Depicklator: 15485❤
#23. Scratch Mini Games, by @Ellesong: 14223❤
#24. ★When My IPhone Rings…★, by @bear123bear456: 13455❤
#25. Super Mario Bros (version 10), by @PaulKoning: 13109❤
#26. Lightcube Platformer, by @firstject: 13014❤
#27. Minecraft v3, by @Finlay_Cool: 12633❤
#28. Paint with Gobo, by @Scratchteam: 12370❤
#29. Color Switch – Target, by @ToadfanSchool: 12240❤
#30. Griffpatch's Tower Defence v0.13b, by @griffpatch: 12027❤
#31. ★ ᐸ ᗯOOᗪ ᗷᖇᗴᗩᛕ ᐳ ★, by @ToadfanSchool: 11930❤
#32. Warrior Cats: Kit to Leader, by @moss-shadow: 11812❤
#33. Pong Starter, by @Scratchteam: 11809❤
#34. diep.io v1.3, by @griffpatch: 11735❤
#35. New Super Mario Bros. Wii For Scratch, by @Brad-Games: 11700❤
#36. Anime Character Maker (girl), by @AnaniAnime: 11561❤
#37. Super Mario Bros, by @Will_Wam: 11560❤
#38. CAT-APULT, by @FUZZIE-WEASEL: 11447❤
#39. How Star Wars Episode 7 Should Have Ended, by @WazzoTV: 11429❤
#40. Dance Party-2, by @Scratchteam: 11392❤
#41. Maze Starter, by @Scratchteam: 11308❤
#42. Paper Minecraft v9.6.c (2D Minecraft), by @thaepicguys: 11195❤
#43. Platformer Tutorial v0.12, by @griffpatch_tutor: 11055❤
#44. Bouncy Heroes (v1.23), by @theChAOTiC: 10948❤
#45. Not quite ball physics game v0.12b, by @griffpatch: 10873❤
#46. Animation Maker, by @KryptykProductions: 10819❤
#47. Harry Potter in 99 Seconds , by @20008932: 10809❤
#48. Pokemon Black and White Battle Engine, by @FRENZY405: 10806❤
#49. City World - the ultimate city simulator, by@macio6: 10468❤
#50. I'm A Cat AMV, by @-BlobbyFish-: 10409❤
#51. The Ninja 2, by @Will_Wam: 10386❤
#52. Arena (v1.762), by @theChAOTiC: 10290❤

Let me know if the list needs to be changed.
Further Info/suggestions to the topic: https://scratch.mit.edu/studios/4588000/:

Good list, this could be useful for people who keep asking the question

what is da game that gets most players dailyLOL

I guess the most popular project is geometry dash?… IDK, but I think it's the most viewed project on Scratch.

Topic closed due to necroposting.