Here is the full list of all 48 OLDTV achievements.
The base game contains 32 achievements, and there is 1 DLC pack containing 16 achievements.
Spending A Lot Of Time
This needed a lot of focus - very well done if you achieved this
Don't let mom know
Spending Time
Seasonally Pleb stuff
Don't confuse this with the other achievement
Almost Pleb stuff
Old-Man Steps
Backinmydaywedidnthavemiceweusedtoeatbricksforbreakfastandcrossthegrandcanyonjustsowecouldgotoschool!
*cue destiny's child*
So you found the space bar
Pleb-ish stuff
Adult Steps
Well done
What a tease
Made it rain
Some people were born to cheat for this achievement
Time to find space
Watermelon Central
Damn fine reflexes
Automation is the future
Teenage Steps
Preteen Steps
Pleb stuff
You're color blind after all
Oranges, Walls & Salsa
Culture Shock
Baby Steps
4.436 Billion
Breed
THERE'S NOTHING LEFT TO DO - GOOD BYE!
Not Pleb stuff