Even if you find a working APK, it will not auto-update. Lab Rats might have critical bug fixes on version 1.2.4, but Uptodown might still host version 1.2.0. You will miss out on improvements.
Lab Rats is an indie game. Downloading a free, unauthorized APK directly hurts the small development team. If you enjoy the game, consider paying for it via an official method (see below). lab rats apk uptodown
Downloading Lab Rats from Uptodown is not illegal in most countries because the game is freeware. However, it violates the developer's terms of service. Even if you find a working APK, it will not auto-update
The ethical problem: DVloper (a solo indie developer) earns money from ads in the free version. When you use a modded APK from Uptodown that removes ads, you are directly taking revenue from a small creator. If you enjoy the game, consider watching the ads or donating to the developer. Downloading Lab Rats from Uptodown is not illegal
Mods and multiplayer: Note: Lab Rats is single-player only, so you won't get banned. However, modded APKs ruin the horror experience (a God Mode makes the game boring in 5 minutes).