[Playing Probotector (NES)]

I actually beat this game without losing a life and as much as I try, I cannot find a difference in speed between this PAL version and Contra. Maybe they sped up the game?

 

My favourite level is the Snow Field level because of the background and music.

[Playing Aliens (C64)]

Don't bother with this game anymore. Play Alien instead. It actually has atmosphere and is faithful to the movie in many ways.

 

Unless you loathe real-time strategy.