Meaningful Play
MDA Framework for game design analysis
Formal Abstract Design Tools
Experimental Gameplay
Rapid Prototyping
Principles of Virtual Sensation + Game Feel
Visual Abstraction and Interaction Abstraction
Flow Theory + Difficulty in Games
Personal Experimental Games
Prototyping for Independent Game Developers
Playtesting Games
User generated content
Persuasive Games
Powder Game (web based), Blast Miner (demo, or free GameTap version), Narbacular Drop, Blocksum, Sumitori Dreams, Chalk, Cave Story, Knytt Stories, Samorost 1+2, Tower of goo unlimited + more games from the experimental gameplay project, Super mario world (free facebook version), Ski Stunt Simulator, Phun, Cortex Command, Strange Attractors, Precision, The Marriage, Stars over Half Moon Bay, Zork, Flow, Cloud, Mega Man, N, I wanna be the guy, Flywrench, Punishment, Passage, Gravitation, Karoshi 2.0, Psychosomnium, Façade, Everyday Shooter (demo), Warning Forever, Cursor10, Every Extend (free version), Spore (freeware creature creator), Little Big Planet (videos), Auditorium, World of Goo (demo), Crayon Physics Deluxe (prototype + demo)