Black Mesa: Undertow (Left 4 Dead 2)

This is a Half-Life Source map port, made as I started learning Hammer. Tried to create my original map, but took the entire week to make one small one that's playable, so I've decided to try with premade map. This tool was terrible, ngl, really hope to have Hammer++ supporting L4D2 in the future.

The campaign contain 4 maps, named BlackMesa_Undertow01 -> 04, take roughly 40 minute to finish, supporting only the campaign mode atm.
After reviewing the layout several chapters that wouldn't make a very fun experience, I've decided to skip those and make only a few of them to be playable, with minimal brush work. Over the original, the map has been given different lighting/time of day, with some use of particle effects. Little Source model were used.

[color=#ff7e14]Map 1 start at Power Up, where the survivor has entered the facility through the gate and must now restart the power generator at the basement, before getting back up to open the gate and get into the safe room.

Map 2 start slightly after On A Rail, as you get into the elevator down to Ichythosaur's pool. Water wont insta-kill you here, so try and walk to one of the two underwater door and get back up to the surface.

Map 3 start at Questionable Ethics, right after Residue Proccessing, another chapter I skipped because of the maze-like layout and a lot of platforming, which the bot will definitely **** up. In this map the survivors must destroy a bunch of computer to unlock the main gate. There will be a counter on top of the screen utilizing Scavenge's HUD element.

Map 4 is the finale, with two different escape vehicle that will be pick at random, at Surface Tension's dam, where you will use the radar to scan for an escape route before boarding either a Boat or a Helicopter to escape. Pay attention and you'll know which one of the vehicle were chosen.[/color]

View Changelog (v1.65 Complete)

Tagged 4/4 Maps L4D2 Survivors Time of day Dusk / Dawn Night Difficulty 2) Average Weather Foggy Player Mode Indoor port half-life black mesa half-life : source

Updated: 01/24/22 • Views: 21,149 • blackmesa_undertow.zip (96MB)

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fpelayo 2 weeks ago

v1.62 seems to have introduced a new bug... play Single Player on the 1st map to see. There's always one bot that hovers around items but can never pick up.

7empest 2 days ago

This is really strange, but if you move/shove the item they will be able to pick it up No idea how to fix this though Edit: Nvm, turns out the problem was caused by one of the survivor_start entity - this freezes them as human player and confuses the bot

7empest 3 weeks ago

Patch notes v1.6: Map 1: - Added support for Survival and Versus mode - Added hint to the elevator - Widen the gap between the ladder and the elevator - Adjusted some item spawning Map 2: - Added support for Versus mode - Added an alternative way down for the first elevator - Added a ladder for 2nd elevator - Fixed a few crate not spawning gibs when destroyed Map 3: - Added support for Versus mode - Improved population, now include CEDA units in the lab area - Fixed SI unable to climb up the ladder in the storage room - Moved panic events, from the mainframe's destruction to the wall explosion, and another to the 4 specimen chamber's glass breaking. - Adjusted some item spawning Map 4: - Added support for Survival and Versus mode - Improved population, now include military units in the base (only work on TLS update and beyond) - Improved helicopter escape sequence effects - Reworked the BG music system

Left4Def 4 weeks ago

good maps !! difficult level are balanced in map 1. 3. 4. but the special infecters in map 2 respawn are too fast

7empest 4 weeks ago

Thanks Is common infected spawning in map 2 ?

Left4Def 4 weeks ago

no i meant special infecters . like smoker. jockey . and charger . splitter...thanks for caring

7empest 4 weeks ago

Yes, but I'm asking if you see common infected in map 2, because there was a bug where they dont appear

kurochama 4 weeks ago

I tested v1.53 & bots in map 2 now moved properly (probably you won't need the bsp & nav files of v1.2 that I sent you). But let's start from map 1. . Map 1: - After testing most versions I figured out something. It's about the mission to power up the generator. Instead of putting some explosive barrels there that make the machine work again after explosion, probably it would be better to put a switch instead. You can choose any types of switch you like (either a switch that only need to be pressed once, or one that players need to hold E until the process bar is full to enable the switch. - I just figured out that now there's an elevator at the generator room that goes directly to the upper floor. Since the previous versions I always walked back to the upper floors so I had no idea that such elevator existed lol :D . . Map 2: - Bots move properly now, & zombies also spawn normally. - There's something about horde spawning more massively after pressing the button to open the door leading to a ladder to go downstair. Well, I don't have a problem with more massive horde though. Probably other people might complain about this. . Map 3 has no problem so far. . Map 4: - I found a bug on helicopter rescue unit. When the helicopter is used as a rescue unit, bots stop just right before entering the helicopter. In my play, I had to shove & push them one by one before the tank came closer. Probably if possible, make it like that in "Dark Carnival" or "The Parish" finale where bots will voluntarily enter the helicopter. I think there should be some functions to make bots gather at certain rescue point/ location when a rescue unit arrives, & you could take a look at either "Dark Carnival" or "The Parish" finale to find the functions. . Well, I think those are my play reports on v1.53. Oh btw, for the finale, is it possible to put some voices to make it more like a real situation? For example, after pressing the radio & the rescue unit is chosen, if the rescue unit is helicopter, the pilot's voices asking for filling up the gas will be heard & players will start the finale after operating the fuel valve (you can use references from "Dead Air" finale). If the rescue unit is a boat, the person in charge of the boat will try to communicate like that in "Swamp Fever" finale in few words & pressing the radio for the 2nd time will start the finale (probably you would need to hide the boat somewhere first & then spawn it once the rescue time is triggered).

7empest 4 weeks ago

Thanks Map 1: I think the explosive barrel is more convenient since you can just shoot it from the distance (once you know what needed to be done ofc) plus in the original HL you also have to destroy the wood that's blocking the generator's pistons. The elevator is added recently, and only usable once the power is on. I should probably add a bunch of hints to it Map 3 still have this bizarre issue where if you die and restart, the wanderers wont spawn up until the area where you died, and panic event wont have them chasing you ? Map 4: I tried to make it like the concert finale, but it ended up with the bug from before where the bot will run to the wrong vehicle (I dont know why) so I'll revert to what it was before this change. Hopefully the incap wont prevent the escape sequence because the "recue vehicle" marker were removed It would be a little trickier if the player dont know which vehicle is chosen so they wont be able to just camp it

sugoku 4 weeks ago

Yes please listen to the guy suggesting ******** the players over by making them scavenge gas cans, which everyone likes to do, and then blow up the rescue in their faces, everyone loves that experience. I agree with him that running to win the game after tank fights is an exploit. Players should be sticking their thumbs up their butts and sniffing them instead of exploiting the game by running to choppers after the last tank.

7empest 4 weeks ago

Well they helped playtesting and leaving feedbacks so ofc I should at least consider their suggestions If it's bad then obviously Im not gonna implement it :^)

kurochama 4 weeks ago

For map 1, well, I suggested switch because the hint itself is about a switch or turn on the machine, if I'm not mistaken. it would be different if the hint were like "Find a way to turn on the machine". . For map 3, I haven't tested to kill myself & restart the round yet. Probably the bug might be related to the game events or script recall on restart. As I'm not a map modder so I have no idea how to solve it, but as a script modder I usually modify game event functions & there are some functions like "mission_lost", "round_start_pre_entity", & "round_start_post_nav" that I usually use to call some scripts on the starting round. I don't know if there are also such functions or scripts in making maps or not. . For map 4, well, you got the point about the camping abuse./ exploit. Players can start to run to the chosen rescue unit after 2nd wave of tank ends. For this abuse/ exploit, actually there also some solutions but it might be a little complicated. I ever played a custom campaign (forgot the name of the campaign) that has a tricky plot-twisted rescue unit. in the beginning, survivors were asked to fill the fuel of the helicopter. The unexpected thing happened during the rescue time. Somehow the helicopter blew up & we had to find another rescue unit under pursuit of zombies. You can also use that trick to randomize the rescue time too if you want. Like for example, if the pilot answers the radio, the plot twist would be the helicopter blows up when survivors are trying to get closer to helicopter at certain radius (far enough not to get the explosion impact/ damage), then the boat horn starts to sound. For boat's plot twist, you can also blow the boat & then make the helicopter starts to work afterwards. Probably the randomized beginning & the end could make the finale more unpredictable & fun.

7empest 4 weeks ago

In map 1 the hint for when you reach the bottom level were "generator isn't running" and "find the generator", and on the barrel there is also a "destroy" hint but it only show within 300 unit iirc For map 3 there is an output for round lost/win etc...but Im not sure what's causing the problem here, probably something to do with bug transported from Half-Life Source, which was very buggy ? Maybe one day I'll figure it out I think the campaign you mentioned is comic styled campaign "Death Strip" where the heli explosion has a spiky bubble with the text "BOOM" on it, but their ending is consistenly run to the truck/van after the explosion (kinda expected it to be random on replays ngl) Yea I could add a few event and speechline to cause a random misdirection to which vehicle will be chosen Though I'm thinking of support for versus/survival mode first, so maybe in a few patches

kurochama 4 weeks ago

I sent you the bsp & nav files of the old version v1.2 via inbox/ pm. You can check there. Anyway, I'm going to try v1.53 & I'll let you know if I find any bugs.

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