Spelunky (2013, Windows)
This game has a prerelease article
Spelunky is a critically-acclaimed Roguelike platformer that will teach you to fear frogs and self-sacrifice. There's also a Windows-only freeware version.
Lit Crush Trap
There's a graphic for a lit-up crush trap, presumably for use in dark Temple levels, but the trap remains unlit in-game.
In alltex.wad, the normal map ALLTILES\alltilesN.jpg seems to contain earlier revisions of some tiles, and perhaps some that never made it into the final game at all. At least some are confirmed to be from an earlier lighting engine.
A "2000m" sign, intended for the screen that transitions between stages; however, as the final boss level is at 1900m and its exit leads directly to the end sequence, this sign is never seen.
A debug graphic used to display the location and color of light sources in the level during development.
This icon was used in the console versions to indicate purchasable playable DLC characters; however, these are included as standard in the PC release.
Two images, nagscreen.png and trialscreens.jpg, for use in the PSN and XBLA demos.
There may be more unused text in strings.pct.
In strings.pct, there's a journal entry for a type of trap that is never seen in-game:
IDS_JOURNAL_FLAMETRAP Flame Trap IDS_JOURNAL_FLAMETRAP_DESC It shoot jets of flames in short bursts.
The trap was possibly implemented, but ultimately abandoned at a very early stage of the game's development. The design would have been similar to an arrow trap, but with a flamethrower-style effect of around three tiles' range, cycling between an on and off state.
Shop text For non-purchasable items
In strings.pct there's alot of text referring to purchasing items that you can't purchase normally.
IDS_BUY_ITEM_SHIELD Buy Shield IDS_BUY_ITEM_VLADSWINGS Buy Vlad's Cape IDS_BUY_ITEM_ROYALJELLY Buy Royal Jelly IDS_BUY_ITEM_IDOL Buy Idol IDS_BUY_ITEM_KAPALA Buy Kapala IDS_BUY_ITEM_VLADSAMULET Buy Vlad's Amulet IDS_BUY_ITEM_UDJATEYE Buy Udjat Eye IDS_BUY_ITEM_HEDJET Buy Hedjet IDS_BUY_ITEM_SCEPTRE Buy Sceptre IDS_BUY_ITEM_BOOKOFDEAD Buy Book of the Dead
These items aren't purchasable in the game normally.