RCK

RCK is a single-level PWAD for Doom that was released in 1994. It was designed by Rich Kyanka, and was followed by RCK2.

Secrets

 * 1) After taking the first teleporter head west along the corridor.  Halfway along is a secret door on the north side leading to a radiation shielding suit and a light amplification visor. (sector 77)
 * 2) From #1, head further west along the corridor to a room with several zombiemen.  There is a nukage pool with a switch on a pillar - press the switch, then get the chaingun in the north-west of this room.  A wall will lower in the north-east of this room, revealing several more zombiemen and a medikit.  The back wall of this area is a lift leading up to a maze with several health bonuses and a demon. (sector 92)
 * 3) Pressing the switch mentioned in #2 lowers a section of floor in the secret maze, revealing a passage with a partial invisibility, a soul sphere and a megaarmor. (sector 97)
 * 4) Directly opposite the switch which opens the door to the yellow key room is a secret door leading to a room with a shotgun guy, a box of rockets, a chainsaw, two medikits and switch.  Walking anti-clockwise round the switch first (before the medikits) activates a crushing ceiling in the nearby room with the cyberdemons and spiderdemon, eventually killing these monsters, then (after the medikits) stopping the crusher.  Both these actions only happen once.  The switch permanently closes the door to the crusher room. (sector 39)

Current records
The records for the map at the Doomed Speed Demos Archive are:

Player spawns
This level contains four spawn points:
 * 1) facing east. (thing 9)
 * 2) facing east. (thing 10)
 * 3) facing east. (thing 11)
 * 4) facing east. (thing 12)

Things
This level contains the following numbers of things per skill level: