Simpsons did it

[Wepwawet]

Tactical combat = Tic-tac-toe (grid, with tokens placed around to see who wins)

Flanking = Tic-tac-toe (if someone is about to do a line, you place a miniature there, to get combat advantage against that move)

Skill challenge = Tic-tac-toe (you need 3 checks in a row to win)

...

 

[Mustrum_Ridcully]

Tactical combat = Tic-tac-toe (grid, with tokens placed around to see who wins)

Flanking = Tic-tac-toe (if someone is about to do a line, you place a miniature there, to get combat advantage against that move)

Skill challenge = Tic-tac-toe (you need 3 checks in a row to win)

...

I would LOL if I wasn't at work.

 

[RigaMortus2]

Very loose one:

Per-Encounter/Daily = WoD (Per Scene, Per Day (even per Chapter) powers)

Per-Encounter is from 3E (Tome of Battle) and there have always been Daily (per day) abilities in D&D.

 

[pawsplay]

defences instead of saving throws == star wars saga edition

= CODA System (LOTR)