Now I placed here some gadgets I like.

Rampage (1984)	122kb
Quick introduction and massacre starts. You jump from one skyscraper to another, demolish buildings, metro and kill troops. By what means, you ask? By controllin A RADIOACTIVE MONSTER. Mwuahahahah! :) What's surprising is that this over 20 yo game runs without any problems on WinXP!

T-32k (2000)	33kb
Remake of the world-famous Turrican! Magicians who created this little gem managed to include colourfull graphics, synthesized music and really large map in the executable having size of 32 kb.