Play Super Smash Flash Online
Ditch the GameCube controller—arrow keys and WASD feel janky at first, but soon you're pulling off dumb combos with Sonic while some chaotic Flash stage tries to kill you both. Unlocking Lloyd took me forever.

Note: Right click and select full-screen for best experience
Super Smash Flash is basically a love letter to Melee, but in your browser. Yeah, it's a Flash game, but don't let that fool you—it's got way more depth than you'd expect. You start with 13 characters (Mario, Sonic, the usual suspects), but unlocking the rest? That's where the real fun begins. I remember grinding through Classic Mode with Pikachu just to get Lloyd from Tales of Symphonia—totally worth it.
The controls take a second to get used to if you're coming from a GameCube controller (arrow keys for movement? Really?), but after a match or two, it clicks. The CPU battles are weirdly hypnotic to watch when you just want to zone out. And the stages? Some are straight-up chaotic in the best way possible.
P1 moves with arrows, jumps with O, attacks with P. P2 uses WASD, G to jump, F to attack. You'll mash those keys harder than you think.