Enter VERSIONNUM as a password.
Level

Password
Tame level
1 Down & out Lemmings
(None)
2 Rent-a-Lemming
IHRTDLCCAR
3 Undercover lemming
LRTDLCADAO
4 Downwordly Nobile lemmings
RTDLCILEAH
5 Smuggle up to a lemming
TDLCAHTFAO
6 Intsy-wintsy..lemming!
DLCIHUTGAJ
7 Who's that lemming
LCALUTDHAG
8 Dangerzone
CILUTDLIAP
9 And now this...
CAHRUDKJAR
10 New lemmings on the block
IHRUDLCKAK
11 With compliments
LRUDLCALAH
12 Citizen lemming
RUDLCILMAQ
13 Thunder-lemmings are go!
UDLCAHVNAJ
14 Get a little extra help
DLCIITUOAR
15 Not just a pretty lemming
LCALVUDPAP
16 Gone with the lemming
CILVUDLQAI
17 Honey, i saved the lemmings
CAHRTFLBBL
18 Lemmings for presidents!
IHRTFLCCBE
19 Lemming Productions present...
LRTFLCADBR
20 Custom built for lemmings
RTFLCILEBK
 
Crazy level
1 "That's a good level"
TFLCAHVFBD
2 Dolly simple
FLCIHTTGBK
3 Many lemmings make level work
LCALUTFHBJ
4 Lemming Express
CILTTFLIBQ
5 24 hour lemathon
CAHRUFLJBE
6 The stack
IHRUFLCKBN
7 And now, the end is near
LRUFLCALBK
8 Keep on trucking
RUFLCILMBD
9 On the Antarctic coast
WNHCEIVNBH
10 Rocky VI
FLCIHVUOBF
11 No problemming!
LCAMTUFPBR
12 Lemming friendly
BIMTUNLQBT
13 It's a trade off
CAIPTDMBCK
14 Time waits for no lemming
IHRTDMCCCF
15 Worra load of old blocks!
LRULICADCH
16 Across the gap
RVLICILECQ
17 Digging for victory
TDMCAHVFCD
18 No problem
DMCIITTGCL
19 Don't panic
ICAMTVLHCO
20 Ice ice lemming
CILVVLIICI
 
Wild level
1 Pop you top!!!
BAHRWLMJCN
2 Lemming hotel
IHPUDMCKCL
3 Lemming rhythms
LPUDMCELCM
4 Meeting adjourned
PUDMCIMMCS
5 Lemming head
UDMCAHVNCM
6 Just a quicky
LICMHVWOCP
7 You take the high road
MCALVUDPCS
8 It's a tight fit
CILVUDMQEL
9 Ice station lemming
CAHRTFMBDO
10 Higgledy Piggledy
IHRTFMCCDH
11 Mutiny on the bounty
MRTNICADDJ
12 Snow joke
PTFMCIMEDM
13 Onward and upward
TNICAHTFDL
14 Ice spy
NICMHUVGDJ
15 The silence of the Lemmings
ICEMVVNHDH
16 Take care, sweetie
CIMVTNIIDK
17 The chain with no name
CAHRUFMJDH
18 Dr Lemming Good
IHRUFMCKDQ
19 Lemmingpelica
MPUNICELDE
20 Got anything… Lemmingy???
PUFMCMLMDI
 
Wicked level
1 Lemming Tomato ketchup facility
UFMCAHTNDN
2 Introducing super lemming
NICMHVUOOQ
3 This corrosion
MCALVUFPDF
4 Oh no! It's the 4th dimension!
CILVUFMQDO
5 Chill out!
GAHRTDHBEM
6 Pop til you drop!
IHRTDLGCEJ
7 Last Lemming to Lemming Central
MPTLLFADEM
8 A towering problem
PVLHGMMEEI
9 How on Earth?
VLHGAHVFEO
10 Temple of Love
DLGIHTTGEP
11 Rocky road
LGALTTDHEM
12 Suicidal tendencies
GILVTLHIEL
13 Almost nearly virtual reality
GEHPUDLJEL
14 The Lemming learning curve
IHPWLHGKEG
15 Spam, spam, spam, egg and Lemming
MPUDLGALEO
16 Five alive
RULHGILMEM
17 Down the tube
ULHGEITNEI
18 Lots more where they came from
DLGIHTUOEI
19 Up, down or round and round
HGAMTWLPEM
20 The Lemming Funhouse
GIMTULHQED
 
Havoc level
1 Tubular lemming
GAIPTFLBFS
2 Be more than just a number
IIPTFLGCFL
3 It's the price you have to pay
LPTFLGADFH
4 The race against cliches
RTFLGILEFS
5 There's madness in the method
TFLGAHVFFL
6 Now get out of that!
FLGIHVTGFE
7 Creature discomforts
LGALVTFHFR
8 Lemming about town
GILTNNHIFM
9 Aaaaaarrrrrrgggggghhhhhh!!!!!!
GAIPUFLJFL
10 Flow control
IHRUFLGKFF
11 Welcome to the party, pal!
MRWFHFALFQ
12 It's all a matter of timing
RUFLGILMFL
13 Highland fling
UFLGAHVNFE
14 Synchronized Lemming
FLGMHTUOFP
15 Have an ice day
LGALVUFPFK
16 Scaling the heights
GILTUNHQFF
17 Where lemmings dare
GAIPVLIBGI
18 Lemmings in a situation
MHPTDMGCGO
19 Looks a bit nippy out there
MPTDMGADGI
20 Look before you lead!
ETDMGILEGS