Hi. I was born in a Mexican border city near Yuma Arizona. In my city in the early to mid eighties a few manufacturing companies started making Atari 2600 games. By reasons you all already know we had the video game crash of 1984 and the companies stop producing games. My father bought us the Atari 2600 in the Christmas of 1981, by 1985 i had at least 100 cartridges. Most of them gotten for 25 cents at local swapmeets. But going back to the manufacturing companies, my Brother was coming back from school and found a cartridge without the plastic case, just the electronic board. he brought it home not knowing what it was and gave it to me. i thought that the board was just like the size of my 2600 cartridges so i plugged in to my Atari 2600. BTW The cartridge had the name DELFIN written with black permanent marker ink on the board. Delfin translated to english is Dolphin. the game had some very futurisic looks not like any i had ever seen. don't remember that well but the gameplay was about tapping your button very fast to speed up your dolphin character, there was a bird flying above the ocean. the game had a feeling kinda like Cave1k in the way you controlled the dolphin...NOw i been looking for this game in rom format or even a description of it's existance... Now the Dolphin Game am talking about it is very different to the Dolphin game already we already know from the atari 2600.
I hope someone can help me to learn the name of this game that it is trully a predecessor of Ecco the Dolphin for Sega
Genesis.
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Another Mistery game we found also without plastic case, and the most beautiful sprites the atari 2600 had ever produced imho, was some sort of like a sidescroller shootem up with no backgrounds, your ship (character) moved only from left to right just like gradius, but as i said only a black background... your nemies had the mos beatiful colors without really defining the shapes other than they were some sort of worms and or and excuse e for this but they looked like spermatozoids anyway the game was very fluid in it's scrolling unlike Vaguard or defender or other games from that era. the enemies had also this spiral paterns, and it was very challenging. in my opinion this game used the hardware to the max like no other game i had ever seen except for... Tutamkham(see below)....BTW the game had subterranea written on it but no, it is absolutly not the subterranea from the roms i have seen.
Tutamkham now this is my damn third mistery...how the hell the tuthamkham i remember playing doesn't look at all like the one most emulators have... the tutamkham i remember had beautiful graphics with like 4 colors in the character itself, and the diamond rings and treasure sprites they ll had this bluish and redish (blue and Red) colors... the tuthamkham from the emulator roms i have found have just a one color shape for the tutamkham lead game character, swords, snakes, and treasures are also one color....
this guy seems to know what i am talking about (partially)
from http://www.linuxjournal.com/article/3996