1)glo-in-the-dark playertype - nope.avi
2)lava rock projectile/emitter - Projectile_Fireball
3)puddle brick - Just build one out of 1x1fs
4)fixed cannon (by Heedicalking) - If it's failed, forget it.
5)prop: flag (colorable flag, not pole) - Impossible with engine. Only one paint node.
6)player relay event - Easily abusable, but then again, so are all relay events.
7)brick pattern decal (blocko camo) - Already done.
8)prop:tree (deciduous, not pine) - Sure, why not?
9)JVS: bookcase door (made available to public) - Already done.
10)Infection mod (like tag, only "it" makes more people "it" until no one isn't "it") - Already done.
11)vehicle: viking longboat - Sure.
12)vehicle: trebuchet - It's possible.
13)prop: rock - Just build one.
14)prop: gargoyle - Sure, why not?
15) JVS: Barn Door - Sure, why not?
16)Weapon that looks like a printer, and fires a sniper bullet - nope.avi
17)AI Giant Crab - onBotSpawn>Bot>SetPlayerScale>2.000
18)Gun that fires invisible bullets - Easily abusible
19)AI safari animals (lion, tiger, rhino, elephant, wolf, bear, etc.) - nope.avi
20)Weapon that saps enemy health while addint to holder's health until one dies/reaches health limit - Weapon_Blutsauger
21)Fixed Vehicle: military jeep (fixed not just found again) - If it's failed, forget it.
22)weapon: javelin (half spear gravity, 50 damage, no splash damage) - nope.avi
23)set print/letter event - Sure, why not?
24)JVS: Drawbridge - Impossible, would require physics upgrade.
25)Medium and Tall Grass Emitters - nope.avi