Listed below are the codes for the single player levels 
of UGH:

1  CAVITY                             
2  FIRSTCOMMUNION                     
3  FIGURATIVE THEATRE                            
4  BURNTOFFERINGS                      
5  MYSTERIUMINQUITATIS                
6  DREAMFORMOTHER                 
7  UNCERTAINJOURNEY                   
8  SPIRITUALCRAMP                     
9  ROMEOSDISTRESS                      
10 RESURRECTION                        
11 PRAYER                             
12 DEATHWISH                           
13 DOGS                               
14 DESPERATEHELL                       
15 AWAKEATTHEWALL                      
16 SLEEPWALK                          
17 THEDROWNING                         
18 THEBLUEHOUR                        
19 ASEVENINGFALLS                      
20 ANDROGYNOUSNOISE                   
21 HANDPERMEATES                      
22 ELECTRADESCENDING                  
23 CERVIXCOUCH                         
24 THISGLASSHOUSE                      
25 FLEEINGSOMNAMBULIST                 
26 THESOMNOLENTPERSUIT                 
27 ASHES                              
28 ASHESPARTII                        
29 WHENIWASBED                         
30 LAMENTOVERTHESHADOWS                
31 FACE                                
32 THELUXURYOFTEARS                    
33 OFTHEWOUND                         
34 BELIEVERSOFTHEUNPURE                
35 OUVERTURE                           
36 WINDKISSEDPICTURES
37 THELAKEOFFIRE
38 BLASTOFTHEBOUGH
39 AMATERASU
40 THEABSOLUTE
41 LACRIMACHRISTI
42 BETWEENYOUTH
43 AFTERTHERAIN
44 WILLOTHEWISP
45 TALESOFINNOCENCE
46 STRAPPINGMEDOWN
47 THEDANZIGWALTZ
48 CHIMEREDESIDELA
49 SILENTTHUNDER
50 STRANGEFORTUNE
51 VENTRILOQUIST
52 GLOOMYSUNDAY
53 THEDEATHOFJOSEF
54 SONGOFSOLOMON
55 SICKOFLOVE
56 VANITY
57 FOURHORSEMEN
58 1983
59 OMEGADAWN
60 ARINGINGINTHEIREARS
61 THEGOLDENAGE
62 ALPHASUNSET
63 SPILTBLOOD
64 RAWWAR
65 REFLECTIONS
66 CHURCHOFNORETURN
67 WHATSTHEVERDICT
68 ZEROSEX
69 THISISHERESY
70 Heh, you're finished!