Gaps of THPS 1

As mentioned in the Tony Hawk's fandom wiki : A complete gap list for THPS1 was never released..

So, how can we be sure that all gaps in THPS 1 have been found ?

Known Gaps

First, I've searched for websites and videos showing where all the gaps were.

At this time, it's Psychochotics who is showing more gaps than anyone.

Total gaps / Total unique gaps

Total gaps : 134
Total unique gaps : 127

Memory

I decided to search inside the THPS 1 game's memory.

To do so, I used BizHawk (the same tool I use to TAS), launch the Hex Editor and searched for TRANSFER.

It brings me this result.

Search in Hex Editor

Hm, it seems that it's where all the gaps name are saved (from address 0x0A0604).

So, the hypothetical full list of gaps is here (the order is kept, not sorted).

Gaps in memory

[WIMPY GAP]
[PHAT GAP]
[TRANSFER]
[TAXI GAP]
[KICKER GAP]
[OVER THE PIPE]
[SECRET ROOM]
[FACEPLANT]
[ACID DROP]
[KICKER 2 STREET]
[BS GAP]
[T 2 T GAP]
[SECRET TUNNEL ENTRANCE]
[TUNNEL GAP]
[OVER THE TUNNEL]
[CAR OLLIE]
[CHEESY DECK GAP]
[DECK GAP]
[BURLY DECK GAP]
[TRUCK GAP]
[ROOF 2 ROOF]
[SUCKY ROOM GAP]
[BIG ASS]
[GLASS GAP]
[WHOOP GAP]
[WALL GAP]
[OVER THE BOX]
[OVER THE RAFTERS]
[POOL HIP]
[POOL 2 WALKWAY]
[HP TRANSFER]
[BRIDGE GAP]
[VERT WALL GAP]
[TWINKIE TRANSFER]
[OVER DA POOL]
[ROOF 2 ROOF GAP]
[SWIM TEAM GAP]
[AWNING GAP]
[GARBAGE OLLIE]
[ROOF TO AWNING GAP]
[DITCH SLAP]
[OVER THE AIR CONDITIONER]
[OVER A FOOTBRIDGE]
[PARK GAP]
[MINI GAP]
[PLANTER GAP]
[OVER A 16 STAIR SET]
[OVER A HUGE 32 STAIR GAP]
[SKATER ESCALATOR GAP]
[32 STEPS OFF A MEZZANINE]
[THE FLYING LEAP]
[RAMP GAP]
[GOING UP GAP]
[GOING DOWN GAP]
[FOUNTAIN GAP]
[RAGING GORGE GAP]
[HUGE WATER HAZARD GAP]
[50 FEET]
[100 FEET]
[150 FEET]
[200 FEET]
[250 FEET]
[SMALL WATER HAZARD GAP]
[BIG WATER HAZARD GAP]
[25 FEET]
[75 FEET]
[125 FEET]
[175 FEET]
[225 FEET]
[RAMP 2 RAMP]
[LOW DECK GAP]
[HIGH DECK GAP]
[PORCH GAP]
[LOMBARD GAP]
[THE GONZ GAP]
[PAGODA GAP]
[OVER THE SEVEN]
[HUBBA GAP]
[STREET GAP]
[HANDI GAP]
[C BLOCK GAP]
[SPINE GAP]
[OVERSIZED 8 SET]
[ACID DROP-IN]
[FOUNTAIN GAP
[PAGODA HOP]
[CHANNEL GAP]
[KICKER 2 LEDGE]
[FREAKIN POOL GRIND]
[ROLL IN CHANNEL GAP]
[HALL PASS GAP]
[BIG RAIL]
[DECK 2 RAIL]
[TAXI 2 LEDGE]
[TAXI 2 RAIL]
[MONSTER GRIND]
[HIGH RAIL]
[HOLY SHI...]
[TRANSITION GRIND]
[KICKER 2 EDGE]
[BS GRIND]
[RAIL 2 RAIL TRANSFER]
[BILLBOARD GRIND]
[DIRTY RAIL]
[DEATH GRIND]
[TRIPLE RAIL]
[BRIDGE GRIND]
[HAWK BRIDGE GRIND]
[RAFTER RAIL]
[PIPE 2 BOX GRIND]
[LIGHT GRIND]
[WALKWAY RAIL TRANS]
[POOL RAIL TRANS]
[ET GRIND]
[BHOUSE RAIL]
[POOL GRIND]
[DECK GRIND]
[MB EMERSON GRIND]
[DUMPSTER RAIL GAP]
[PLAYGROUND RAIL]
[RAIL TO RAIL TRANSFER]
[HUGE RAIL]
[LONG ASS RAIL]
[FUNBOX TO RAIL TRANSFER]
[FUNBOX TO TABLE TRANSFER]
[GIMME GAP]
[HANDICAP RAMP RAIL]
[COFFEE GRIND]
[FOR THE WHOLE ATRIUM]
[RAIL COMBO]
[NEVERSOFT ELEC CO GAP]
[DOWN THE SPIRAL]
[LOMBARD LEDGE]
[HUBBA LEDGE]
[HOOK RAIL]
[RAIL 2 RAIL]
[BACKWOODS LEDGE]
[BENDY'S LIP]
[ARE YOU KIDDING?]

Now, if I match those gaps with the Psychochotics's ones, it gives this :

Gaps in memory matched with Psychochotics's gaps

[WIMPY GAP] => Downtown
[PHAT GAP] => Downtown
[TRANSFER] => Warehouse, Skate Park, Downtown, Burnside
[TAXI GAP] => Warehouse
[KICKER GAP] => Warehouse, School, Downtown
[OVER THE PIPE] => Warehouse, Skate Park
[SECRET ROOM] => Warehouse
[FACEPLANT] => Warehouse
[ACID DROP] => Skate Park
[KICKER 2 STREET] => Downtown
[BS GAP] => Downtown
[T 2 T GAP] => Downtown
[SECRET TUNNEL ENTRANCE] => Downtown
[TUNNEL GAP] => Downtown
[OVER THE TUNNEL] => Downtown
[CAR OLLIE] => Downtown
[CHEESY DECK GAP] => Downtown
[DECK GAP] => Downtown, Roswell
[BURLY DECK GAP] => Downtown
[TRUCK GAP] => Downtown
[ROOF 2 ROOF] => Downtown
[SUCKY ROOM GAP] => Downtown
[BIG ASS] => Downtown
[GLASS GAP] => Downtown
[WHOOP GAP] => Skate Park
[WALL GAP] => Skate Park
[OVER THE BOX] => Skate Park
[OVER THE RAFTERS] => Skate Park
[POOL HIP] => Skate Park
[POOL 2 WALKWAY] => Skate Park
[HP TRANSFER] => Skate Park
[BRIDGE GAP] => Burnside
[VERT WALL GAP] => Burnside
[TWINKIE TRANSFER] => Burnside
[OVER DA POOL] => Burnside
[ROOF 2 ROOF GAP] => School
[SWIM TEAM GAP] => School
[AWNING GAP]
[GARBAGE OLLIE] => School
[ROOF TO AWNING GAP] => School
[DITCH SLAP] => School
[OVER THE AIR CONDITIONER] => School
[OVER A FOOTBRIDGE] => School
[PARK GAP] => School
[MINI GAP] => School
[PLANTER GAP] => School, Mall, Streets
[OVER A 16 STAIR SET] => Mall
[OVER A HUGE 32 STAIR GAP] => Mall
[SKATER ESCALATOR GAP] => Mall
[32 STEPS OFF A MEZZANINE] => Mall
[THE FLYING LEAP] => Mall
[RAMP GAP]
[GOING UP GAP] => Mall
[GOING DOWN GAP] => Mall
[FOUNTAIN GAP] => Mall, Streets
[RAGING GORGE GAP]
[HUGE WATER HAZARD GAP] => Downhill Jam
[50 FEET] => Downhill Jam
[100 FEET] => Downhill Jam
[150 FEET]
[200 FEET]
[250 FEET]
[SMALL WATER HAZARD GAP]
[BIG WATER HAZARD GAP]
[25 FEET] => Downhill Jam
[75 FEET] => Downhill Jam
[125 FEET]
[175 FEET]
[225 FEET]
[RAMP 2 RAMP] => Streets
[LOW DECK GAP] => Roswell
[HIGH DECK GAP] => Roswell
[PORCH GAP] => Streets
[LOMBARD GAP] => Streets
[THE GONZ GAP] => Streets
[PAGODA GAP] => Streets
[OVER THE SEVEN] => Streets
[HUBBA GAP] => Streets
[STREET GAP] => Streets
[HANDI GAP] => Streets
[C BLOCK GAP] => Streets
[SPINE GAP] => Streets
[OVERSIZED 8 SET] => Streets
[ACID DROP-IN] => Streets
[FOUNTAIN GAP
[PAGODA HOP]
[CHANNEL GAP] => Warehouse, Roswell
[KICKER 2 LEDGE] => Warehouse
[FREAKIN POOL GRIND]
[ROLL IN CHANNEL GAP] => Roswell
[HALL PASS GAP] => School
[BIG RAIL] => Warehouse
[DECK 2 RAIL] => Warehouse
[TAXI 2 LEDGE] => Warehouse
[TAXI 2 RAIL] => Warehouse
[MONSTER GRIND] => Warehouse
[HIGH RAIL] => Warehouse
[HOLY SHI...] => Warehouse
[TRANSITION GRIND] => Warehouse
[KICKER 2 EDGE] => Downtown
[BS GRIND] => Downtown
[RAIL 2 RAIL TRANSFER] => Downtown
[BILLBOARD GRIND] => Downtown
[DIRTY RAIL] => Downtown
[DEATH GRIND] => Downtown
[TRIPLE RAIL] => Burnside
[BRIDGE GRIND] => Burnside
[HAWK BRIDGE GRIND]
[RAFTER RAIL] => Skate Park
[PIPE 2 BOX GRIND] => Skate Park
[LIGHT GRIND] => Skate Park
[WALKWAY RAIL TRANS] => Skate Park
[POOL RAIL TRANS] => Skate Park
[ET GRIND] => Roswell
[BHOUSE RAIL] => Roswell
[POOL GRIND] => Roswell
[DECK GRIND] => Roswell
[MB EMERSON GRIND] => Roswell
[DUMPSTER RAIL GAP] => School
[PLAYGROUND RAIL] => School
[RAIL TO RAIL TRANSFER] => School
[HUGE RAIL] => School
[LONG ASS RAIL] => School
[FUNBOX TO RAIL TRANSFER] => School
[FUNBOX TO TABLE TRANSFER] => School
[GIMME GAP] => School
[HANDICAP RAMP RAIL] => School
[COFFEE GRIND] => Mall
[FOR THE WHOLE ATRIUM] => Mall
[RAIL COMBO] => Mall
[NEVERSOFT ELEC CO GAP] => Downhill Jam
[DOWN THE SPIRAL] => Streets
[LOMBARD LEDGE] => Streets
[HUBBA LEDGE] => Streets
[HOOK RAIL] => Streets
[RAIL 2 RAIL] => Streets
[BACKWOODS LEDGE] => Streets
[BENDY'S LIP] => Streets
[ARE YOU KIDDING?]

Ah, some gaps seems not found yet. Let's take a look.

Gaps not found yet

[AWNING GAP]
[RAMP GAP]
[RAGING GORGE GAP]
[150 FEET]
[200 FEET]
[250 FEET]
[SMALL WATER HAZARD GAP]
[BIG WATER HAZARD GAP]
[125 FEET]
[175 FEET]
[225 FEET]
[FOUNTAIN GAP
[PAGODA HOP]
[FREAKIN POOL GRIND]
[HAWK BRIDGE GRIND]
[ARE YOU KIDDING?]

Gaps not found

In the list, we can make some hypothesis :

Fountain Gap already exists in the list but this one seems to have a typo in its name (the ending square bracket is missing : [FOUNTAIN GAP instead of [FOUNTAIN GAP]). Hm, this is not a new gap to look for, IMO.
125 Feet, 150 Feet and 175 Feet have already been reached. The others (200 / 225 / 250 Feet) not yet but are likely to be on the continuity.

But what about the others gaps not found ?

One thing we can notice in the memory gaps listing is that they are (almost) all grouped by their level.

Can we deduce that way in which level those missing gaps are ? Let's try.

Awning Gap

[ROOF 2 ROOF GAP] => School
[SWIM TEAM GAP] => School
[AWNING GAP]
[GARBAGE OLLIE] => School
[ROOF TO AWNING GAP] => School
[DITCH SLAP] => School
[OVER THE AIR CONDITIONER] => School
[OVER A FOOTBRIDGE] => School
[PARK GAP] => School
[MINI GAP] => School

Awning Gap could be in School.

Ramp Gap

[OVER A 16 STAIR SET] => Mall
[OVER A HUGE 32 STAIR GAP] => Mall
[SKATER ESCALATOR GAP] => Mall
[32 STEPS OFF A MEZZANINE] => Mall
[THE FLYING LEAP] => Mall
[RAMP GAP]
[GOING UP GAP] => Mall
[GOING DOWN GAP] => Mall

Ramp Gap could be in Mall.

Raging Gorge Gap

[RAGING GORGE GAP]
[HUGE WATER HAZARD GAP] => Downhill Jam
[50 FEET] => Downhill Jam
[100 FEET] => Downhill Jam

Raging Gorge Gap could be in Downhill Jam.

Small Water Hazard Gap / Big Water Hazard Gap

[50 FEET] => Downhill Jam
[100 FEET] => Downhill Jam
[150 FEET]
[200 FEET]
[250 FEET]
[SMALL WATER HAZARD GAP]
[BIG WATER HAZARD GAP]
[25 FEET] => Downhill Jam
[75 FEET] => Downhill Jam
[125 FEET]
[175 FEET]
[225 FEET]

Small Water Hazard Gap and Big Water Hazard Gap could be in Downhill Jam.

Pagoda Hop

[PORCH GAP] => Streets
[LOMBARD GAP] => Streets
[THE GONZ GAP] => Streets
[PAGODA GAP] => Streets
[OVER THE SEVEN] => Streets
[HUBBA GAP] => Streets
[STREET GAP] => Streets
[HANDI GAP] => Streets
[C BLOCK GAP] => Streets
[SPINE GAP] => Streets
[OVERSIZED 8 SET] => Streets
[ACID DROP-IN] => Streets
[FOUNTAIN GAP
[PAGODA HOP]

Pagoda Hop could be in Streets.

Freakin Pool Grind

[CHANNEL GAP] => Warehouse, Roswell
[KICKER 2 LEDGE] => Warehouse
[FREAKIN POOL GRIND]
[ROLL IN CHANNEL GAP] => Roswell

Freakin Pool Grind could be in Roswell.

Hawk Bridge Grind

[TRIPLE RAIL] => Burnside
[BRIDGE GRIND] => Burnside
[HAWK BRIDGE GRIND]

Hawk Bridge Grind could be in Burnside.

Are You Kidding?

[DOWN THE SPIRAL] => Streets
[LOMBARD LEDGE] => Streets
[HUBBA LEDGE] => Streets
[HOOK RAIL] => Streets
[RAIL 2 RAIL] => Streets
[BACKWOODS LEDGE] => Streets
[BENDY'S LIP] => Streets
[ARE YOU KIDDING?]

Are You Kidding? could be in Streets.

Are there really some missing gaps ?

As seen above, some gaps are questioning.

Are those missing gaps really implemented in the game ?

Another clue to this investigation is when you search exactly for "Small Water Hazard Gap" (here in Google), only one answer is found : this code repository.

It seems that this project dumps the gaps existing in THPS 2x. In this game, the levels of THPS 1 are playable but, as mentioned in the associated wiki, Gap checklist only includes THPS2 levels..

Ok, but the fact that some of those missing gaps are present in the codebase of THPS 2x is really intriguing.

Missing Gaps vs Gaps in THPS 2x

Missing gaps that are in the dump of THPS 2x

Raging Gorge Gap
Small Water Hazard Gap
Pagoda Hop
Hawk Bridge Grind
Are You Kidding?

Missing gaps that are not in the dump of THPS 2x

Awning Gap
Ramp Gap
Big Water Hazard Gap
Freakin Pool Grind

Does this says that 5 gaps are really missing in THPS 1 ? Arf, can't say, it's just a clue.

Conclusion

With this little investigation, I cannot conclude that every gaps in THPS 1 have been found yet.

If you have any additional details, you can create an issue ;-D

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