system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did Crysis look so good for it's time?
gpt
We've been doing photo realistic CGI for years. If it's a movie, you can calculate all the effects ahead of time on a supercomputer and just show the end product. If it's a game you have to calculate the effects at least 30 times a second on whatever combination of hardware player has.

Crysis had effects that only computers of a future could generate in real time. Hardly anyone had PCs powerful enough to run it in all its glory.