Don't know other game with scythe apart from Undying. Just in case: check Blood and Dracula.

Perhaps try to give more info. If there is scythe as a weapon, it is probably horror game, so we can exclude sfi-fi shooters, right?

Aye, you can exclude sci-fi. I really wish I could give you more information, but unfortunately I don't remember too much about it. At this point I could only really describe the compilation disc it came on.

Oh, also both those games are not it either. I actually ran into those games while looking for it myself and I can say it is neither of them.

How about Powerslave?

Nope. Though this is another game to go on the list of things to try. I think that even if I don't find the game I'm looking for I'll have quite the list of other games to try.

Well, ok then, so it is horror FPS similar to Blood, Witchaven and Undying... or somewhere in between :)

If it is "shooter", not RPG (with improving stats and everything) then what were you shooting with? Modern pistols and guns or with arrows and wizards staff and similar spell casting?

Also check: Montezumas Return, Amulets and Armor, 7 paladins or something, Shadow Warrior...

edit:
Also, if you there is hope that game is on mobygames, check this filtered search and narrow it done by year and system or change filters entirely... you'll find more games to add to your list at least

oh yeeah, also check KISS game

I still don't get it: it's bright->lots of light
or bright->colorful
As I've seen lots of mods, my mind can't help on it. Don't you remember any other thing about it? It could be a standalone mod for Doom even...
I'd guess it could be Chex Quest, even that I don't remember a scythe... :mhh:

1.When I say bright what I mean is probably both in this case. I remember bright reds, blues, and greens, as well as that I remember it (at least in the beginning because this was a demo) taking place outside with a rather cheery looking sky.

2.It might possibly have been a mod, yes. That thought struck me some time after creating this threading and spending several hours looking for the game, though I can for certain say it's not Chex Quest.