Submission #5405: Meerkov's NES Cobra Triangle in 16:43.73

Console Nintendo Entertainment System Emulator Bizhawk 1.11.6
Game Version USA Frame Count 60323
ROM Filename Cobra Triangle (U) [o1].nes Frame Rate 60.0988138974405
Branch Rerecord Count 13539
Unknown Authors Meerkov
Game Cobra Triangle
Submitted by Meerkov on 2/26/2017 9:13:41 PM

Submission Comments
This is an any% speedrun of Cobra Triangle, for the NES. Where it doesn't cost time, this run shows off tricks and glitches.
Cobra Triangle is a vehicle based shooter. The game has a few different level types to keep things interesting. The most recent run of this game was from 2005. As one of the oldest unbroken records on the site, it seemed ripe for an update. The previous run by Adelikat was done using an old version of FCEU. This run doesn't sync on modern emulators, so I dug up an old copy of the emulator so I could get timing information for comparison. Due to emulator differences, load times are sometimes a frame longer or shorter.

Level Types

  • Race: You just need to get to the end. Two of the races have two exits. Depending on which of the 4 possible exit combinations you choose, it changes the order and sometimes the composition of the levels.
  • Mines: Deliver mines from the start to the end without the enemy boats stealing them back.
  • Rapids: Get to the finish while either Logs or Icicles obstruct you.
  • Guard: Make sure the enemy boats can't kidnap all the swimmers. Ends when time runs out.
  • Boss: A giant monster appears for you to kill.
  • Bonus: This level is an autoscroller. Shoot as many targets as you can for bonus points.
  • Pods: Get some free upgrade modules. Ends when time runs out.

Comparison to Previous run:

0Game Start 667 6643
1 Race 127422617125
2 Pods 132783279-1
3 Mines 12097202176
4 Logs 118851886-1
5 Boss 11053103914
6 Bonus 1188718861
7 Guard 141784179-1
8 Falls 1134413440
9 Race 2367836726
10 Boss 21125104283
11 Bonus 220952096-1
12 Logs 223122319-7
13 Mines 22916288630
14 Race 35077503443
15 Pods 2328032800
16 Guard 2509650960
17 Boss 31055103223
18 Bonus 321542155-1
19 Race 45108504167
20 Logs 320932094-1
21 Mines 328822887-1
22 Falls 2134913490
23 Boss 4 947 89453
24 Boss 5 976 530446

Level Breakdown:

Level 1: Race

I used RNG manipulation to get the upgrade PODs much faster. I take the same route (left in Level 1, and Right in Level 9) because it seems to be the best route. Note: If you go (right/right) then, although levels change order, the only important difference is that the final Logs level is replaced by an 8 second longer Icicle level. Other than that, the order and composition of the levels is largely irrelevant (e.g. the Mines 2 and Mines 3 levels appear in opposite order, with the later one having whirlpools. Otherwise they are unchanged).

Level 2: Pods

I purposely do not get homing missiles. This allows greater control of my weapons during boss battles. Otherwise, homing missles tend to stay on screen too long, when it would be better to have them despawn so you can fire again.

Level 3, 13, 21: Mines

In all the Mines levels, I use better AI manipulation through bumping them or positioning my boat so they need to do a full U-turn, which helps prevent them from catching up too fast. The AI moves faster than you, except while turning. In one level I manipulate them into crashing into eachother which reduces their velocity greatly.

Level 5, 10, 17, 23: Bosses 1-4

Because I don't have homing missiles I can control my shots much easier. I use Force on two of these levels so I can get very close to the boss (invincibility). Note: Force doesn't prevent the boss from tossing you. The crab boss is the hardest to optimize because depending on the RNG it may do a variety of different types of attacks, or continue moving in different directions.

Level 7, 16: Guard

These levels have a fixed time, so I show off two AI glitches. The first is, if you are holding the last victim, no more boats will spawn. The boat that is still searching for it will try to steal it from you, however due to the AI, it will get stuck waiting for you to move, which causes it to just sit there.
The second glitch is that after a boat captures a swimmer, it will try to navigate to one of the exits. However because the boats have a wide turning radius, it can get stuck in a loop trying to turn towards the exit. The player can help it happen by bumping the enemy boat. Because the player doesn't have the victim, this also prevents UFOs from spawning, meaning we can just sit here and watch the boat spin around.

Level 12: Logs

I lose 7 frames because instead of using the Force on this level, I used it on the previous boss.

Level 24: Boss Shark

The final level of the game, and the biggest improvement. Through better timing of attacks, I am able to kill the boss in a single attack cycle, instead of two cycles used in the first run. This saves over 7 seconds.

Misc Notes:

At the end of the level, you can get 1000 points for spinning around. I alternate L and R to achieve massive bonus points.
Your score rolls over after 999,999. My final score is 1,597,450.
In the Race levels, there are Ramps you can use to make jumps. I tried to use them to shortcut parts of the race, however it seems it's not possible.
If you drive onto the ramp from any direction other than the intended part, you just pass through it. This means you can freely drive through the ramps from the back, in the POD levels, which I demonstrate.

adelikat: Replaced movie file with one with a cleaned up header. Gives it proper sync settings, the hash of a good dump, 1.12 header info, and removes an unnecessary soft reset on frame 1 (an artifact of .fcm conversion). The actual content of the movie is unchanged.

Masterjun: Judging.
Masterjun: This game might seem like it's going to be boring, but it's fast-paced and entertaining especially in this run. Great improvements, not only speed-wise, but also in the entertainment. Showing off glitches and playing around with the broken AI's certainly make this run very fun to watch!
The previous run is in the Vault but this new run is entertaining enough to grant an upgrade. Accepting to Moons as an improvement to the previous run.
feos: Pub.

Last Edited by on 1/1/2022 6:13:39 PM
Page History Latest diff List Referrers