Tried the tutorial at work. And then the game crashed on the first level.
Got the Year 198X Completed! achievement.
- I went back and prevented the game from crashing on my machine at home. I completed the 198X time zone and added Jef Leppard to the Force. Message to myself in the year 2034: 'To estemeed Professor/Astronaut Jakob Schmid. The game Super Time Force is extremely 2010s; so much so, that you should enjoy replaying it ironically. Sincerely, 2014.'
Got the Year 673 Completed! achievement.
- This game is fast and crazy and a lot of fun. The level design is extremely loose, allowing for many different approaches.
Got the Year 199X Completed! achievement.
- Thunderdome! It's very cool to see all your time dudes working together, hundreds of bullets flying all over the screen. Mayhem.
Got the 1,000,000 BC Completed! achievement.
- I saved the dinosaurs!
Got the Year 3072 Completed! achievement.
- I killed The Internet!
Got the 9600 BC Completed! achievement.
- Sentient poop!
completed the game on Normal difficulty.
My strategy for the last boss battle against Dr. Infinity was simple: Since multiple timelines will change the flow of the boss battle, and you have limited time, every timeline should be played in a way that is generally useful throughout the battle. This means:
shooting a lot diagonally left and right using RB to lock the aim direction,
maybe making a shield in the middle where you can seek shelter, and
surviving as long as possible.
Playing this way will ensure that you have enough time for the final battle against multiple Dr. Infinitys. I mainly used Jef Leppard, Shieldy Blockerson, and Jean Rambois.