Check out CSDB for multi load games in TCRT format.
CSDB Search
You can load the browser by pressing the SHIFT and RUN/STOP keys or by typing LOAD command and pressing the RETURN key.
How to Record Games to Tapes:
Choose a TAP file and press RETURN.Press RECORD and PLAY buttons.Press and hold down the SPACE bar untill you can see the game is loading and let go.If you don't hold the space bar,the game will be recorded to the tape but it won't be loaded to C64.
If you are recording a multi load game,take the top lid off so you can see the activity LED.When it stops blinking,TAP is fully recorded to the tape.
How to create TCRT files:
2.Copy your PRG files to the folder called PRG.You need minimum 2 PRG files.You can't convert a single PRG file to TCRT.
3.Double click Runme.bat. It wil create game-Vol#1.tcrt Rename it before moving to your SD card.