I am hearing some rumors being reported today after seeing a spike in chatter within the gaming community on today. I have not seen the third-party game tracking tools show this much rumor in a long time. I will say the tracking tools are way more heated than the chatter I am seeing, so something might be off here. Again, I saw some initial chatter from within the gaming forums and on this site starting on today.  Now, I decided to cover it on everyday even if the chatter was not at the levels that would warrant me posting something.
To be clear, Wendgames' radar has not confirmed any release is officially going on.
Mod, cheat or hack tracking tools:
Let's start with what the tools are showing:
Bila sensor:

Souma sensor:

So most of these tools are incredibly heated, signaling that they are showing available mod, hack or cheat for the game.
Wendgames chatter:
Here is some of the chatter from various comments on this site and facebook groups since the release:

Holy shit this is the biggest gaming news of the year

I surprisingly knew about this game's existence before this!

From someone who actually played it, it's fine, just a pretty average  game. Unless you're chomping at the bit for new experiences, if it looks interesting to you just play the first one.

Let's make a little summary for the game:
GAME INFO
Name of Game: Sniper 3d Train Shooter
Version: 1.2.2

Name of the cheat, mod, hint, tip or hack:
-Unlimited Money
-Mod Menu
-Money increases instead of decreasing
-Massive attack
-God mode
-Free Purchases
-Free Shopping
-Enemy does not attack
-Weak enemies
-Unlimited coins/hearts/gold/gems
-Dumb Enemies
-Free Store
-Stats Boosted
-Mega Mod
-High damage/No Shake No Recoil
-mod rewards
-Damage & defense multiplier
-Game speed multiplier
-Unlimited Ammo/no reload/No Recoil
-radar hack/Infinite money
-Unlocked/all levels unlocked

Game description:
The time to take action and strike back in Sniper 3d Train Shooter is now! terrorist heading towards city with their commander in train to attack the city. We’re calling for the best sniper in the world to take aim at evil, wherever it hides. There’s no room for remorse, so shoot to eliminate. strategic skills and orchestrate the perfect assassination shot.

Sniper 3d Train Shooter : Step into the shoes of Agent 47 in Train Shooter Sniper 3d and discover the most compelling sniper experience on mobile. Make the best sniping strategy to destroy the enemies in this snipers mission! this Americans sniper trains acts like rail shooter and eliminate each and every enemy by targeting and shoot them. It’s time to show some ultimate hitman skills. Many challenging attack from enemy on a moving train.

In sniper 3d train shooter weapons are the next level shoot 3D sniper rifles, railguns and more. Upgrade battlefield arsenal to strike fast and hard at the heart of evil! Fulfill US transportation duty that require protection from terrorist attack. This unique concept of trains SHOOTING game for free on moving trains makes it most addictive and thrilling free shooters games. Energy level up during the counter strike against the invasion. Many long range snipers rifle, with perfect aim to pull the trigger to destroy enemy. Please be careful and look around to prevent the enemies from SHOOTING.

Download now for free one of best offline shooting games on mobiles
Get best shooter or sniper elite and combat on the frontline. It’s time to take action in the battlefield. Shoot to eliminate in special ops and survive in this addictive sniper shooting game!

Sniper 3d Train Shooter Features:
• Unbelievable 3D sniper graphics that probably make this the best game for FPS gun fun.
• This isn’t one of those ordinary gun games.
• “Bullet time” effects that blow all other FPS gun games away. Amazing sniper shots effect.
• Weather effects unlike those in any other shooting game around.

Download now one of the best 3d shooting games! FREE fps game! Survival at all costs!

Sniper 3d Train Shooter MOD APK Version 1.2.2

Manual Steps:
1. Install Modded APK
2. Play

Download Now
In any case, the best mod, cheat or hack for now comes down to these tips:

1. The first cheat or exploit is to not skip the tutorial, even if you're an advanced player and this is your second, third, or fourth alt account. The beginner's tutorial gives you lots of free stuff and rewards, which are some of the most valuable items in the game.
2. Keep watching the ads and collecting more and more daily currency rewards.
3. Play daily events for more chances to get better currency.
4. Practicing to get better time in PVE or offline mode.
5. Don't skip any unleashed events.
6. Use ad packs from the store to get currency. And free packs can be obtained every certain number of hours.
7. Watch YouTube or Twitch videos: gamer's gameplay style and tutorials.
8. Play against many different opponents with many different gameplay styles.
9. Join the game community on Discord, Reddit, Facebook, or other social media platforms where you can share your gaming experience.
10. Are you a competitive online mobile gamer? The secret to becoming a top mobile gamer is to first have at least a medium-range phone or a top-of-the-line phone. Without a good device, you will never be a good gamer. Next, you need a superfast internet connection. If you want to do exploits against other gamers online in real time, you need incredible internet connectivity, or else lag will become your best friend when your ping goes up to over 300 ms. And finally, you need to be me, Wendgames, the greatest mobile gamer the world has ever seen. If anyone else tells you anything else, they're lying. Skills only come through persistence with great devices and fast connectivity to react appropriately against enemy players.