Space Invaders 91' is just like a 16-bit edition of the same game, kind of like when Pac-Man first came to SNES and Genesis with brighter colors and a few new tricks.
http://www.youtube.com/watch?v=b5JsJSbJWxs <-- GamePlay of Space Invaders 91'
Two Crude Dudes is actually another attempt to re-invent "BAD DUDES Vs. The Dragon Ninjas" from the NES and Arcade since it was done by Data East as well. Except, this one is a little harder and just weird. So amazing regardless!
http://www.youtube.com/watch?v=sNuwX0Hndm4 <-- Two Crude Dudes Gameplay
Thunder Force III is quite astounding as a space shooter and one of the finer games in the series that really put it on the map after a drastic change compared to Part 1 and 2. Many fans would have to agree that part four, known as "Lightning Force" in American and Europe is far superior. Thunder Force III was ported to the SNES a year later, but under the name "Thunder Spirits". Sadly, the SNES could not handle the fast speed of the game, so you will see lag from time to time much like Gradius III.
http://www.youtube.com/watch?v=sutuPUTOo48 <--- GamePlay of Thunder Force III