The C.P.U.

The C.P.U. is a single-level PWAD for Doom II that came out in 1995. It was created by Christen Klie. It was initially submitted for inclusion in Master Levels for Doom II, but was rejected.

Secrets

 * 1) After getting the blue key, press the wall west of the southern teleporter in the yellow key room. It opens, revealing three energy cell packs and a switch. (sector 144)
 * 2) The switch in #1 opens up a door next to the blue key, behind which is a soul sphere. (sector 142)
 * 3) The switch in #1 also opens a door south of the adjacent teleporter, leading to a BFG9000. The sector itself is too small to receive credit for. (sector 122)
 * 4) Go down three steps from the rocket launcher, and shoot the eastern wall. It opens, revealing a backpack, 11 imps, and a heavy weapon dude (hard skill only). There is also a switch which lowers platforms containing five boxes of rockets, an invulnerability and a megasphere. (sector 217)

Bugs
As it is not possible to obtain credit for Secret #3 (see above), the maximum possible secrets percentage on this level is 75%.

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

Player spawns
This level contains four spawn points:
 * 1) facing north. (thing 35)
 * 2) facing west. (thing 40)
 * 3) facing west. (thing 42)
 * 4) facing west. (thing 46)

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