After the Dinosaurs

After the Dinosaurs is an 1995 game on NES and SNES.Main hero is an zalambdalestes named Zack.

Plot
The story happens after dinosaur's extinction,and an Ancient Cat sells Zack a letter:

"After the vanishing of tyrannic lizards,mammals,such as cats,monkeys and you,we started to find artefacts.We found a strange relic - long spear with strange language....That seems to be an dinosaur spear!

And maybe,those terrors has survived...."