With Flash Having a ~year left of browser support, lets get some Flash Games that you grew up with going to pay them a final visit
if you post Happy Wheels or Poptropica you lose
Madness Interactive
https://www.newgrounds.com/portal/view/118826
Divine Intervention
https://www.kongregate.com/games/totaljerkface/divine-intervention
Monsters Den
https://www.kongregate.com/games/garin/monsters-den-book-of-dread
(Yes, I all these games are fun and yes I played them all enough to favorite them on kong or elsewhere...)
My Top 5? Just take a minute to look into the spoilers and I have the top five labeled. :) -- well, ended up as a Top 6 labeled as 5. Meh *shrug*
I played a fair bit on kong back around 2008-2009... that was how I found Elements a month or two-ish after it was released!
I reviewed my kong favorites list and here are the ones I still remember really enjoying:
Favorite to a point where I started avoiding them because it was detrimental to RL how addicted I would get to almost ALL of them...
https://www.kongregate.com/games/gameinabottle/gemcraft
https://www.kongregate.com/games/gameinabottle/gemcraft-chapter-0
https://www.kongregate.com/games/inXile_Ent/fantastic-contraption (Top 5)
https://www.kongregate.com/games/CasualCollective/desktop-td-pro
https://www.kongregate.com/games/gaby/onslaught2
https://www.kongregate.com/games/Ninjakiwi/bloons-tower-defense-4 (Top 5)
https://www.kongregate.com/games/Ironhidegames/kingdom-rush-frontiers
https://www.kongregate.com/games/Armegalo/random-defence (Top 5)
https://www.kongregate.com/games/Armegalo/random-defence-2
https://www.kongregate.com/games/preecep/desktop-tower-defense
https://www.kongregate.com/games/preecep/desktop-tower-defense-1-5_preview
https://www.kongregate.com/games/HeroInteractive/bubble-tanks-tower-defense
https://www.kongregate.com/games/Ninjakiwi/bloons-tower-defense-2
https://www.kongregate.com/games/Ninjakiwi/bloons-tower-defense
https://www.kongregate.com/games/DarkRealmStudios/pandemic-2
https://www.kongregate.com/games/rudy_sudarto/epic-war
https://www.kongregate.com/games/Louissi/age-of-war
https://kevan.org/rubicon/ (Top 5)
https://www.kongregate.com/games/PleasingFungus/manufactoria (Top 5)
https://www.kongregate.com/games/krispykrem/kohctpyktop-engineer-of-the-people
https://www.kongregate.com/games/krispykrem/the-codex-of-alchemical-engineering (Top 5)
https://www.kongregate.com/games/krispykrem/the-codex-of-alchemical-engineering-magnum-opus-challenge
Probably pretty obvious but I'm not much of a FPS or action type game guy. To each their own!